./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b02.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/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_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/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 64bit --witnessprinter.graph.data.programhash b85d52a1932fa85f97c362ca60a681b550e6be8c5a2b0a8b0363e5b8a5a0a447 --- 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 04:11:24,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:11:24,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:11:24,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:11:24,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:11:24,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:11:24,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:11:24,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:11:24,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:11:24,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:11:24,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:11:24,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:11:24,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:11:24,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:11:24,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:11:24,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:11:24,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:11:24,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:11:24,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:11:24,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:11:24,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:11:24,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:11:24,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:11:24,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:11:24,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:11:24,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:11:24,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:11:24,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:11:24,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:11:24,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:11:24,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:11:24,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:11:24,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:11:24,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:11:24,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:11:24,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:11:24,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:11:24,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:11:24,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:11:24,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:11:24,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:11:24,936 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 04:11:24,959 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:11:24,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:11:24,960 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:11:24,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:11:24,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:11:24,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:11:24,961 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:11:24,961 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:11:24,962 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:11:24,962 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:11:24,962 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:11:24,962 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:11:24,963 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:11:24,963 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:11:24,963 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:11:24,963 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:11:24,964 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:11:24,964 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:11:24,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:11:24,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:11:24,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:11:24,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:11:24,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:11:24,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:11:24,966 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:11:24,966 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:11:24,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:11:24,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:11:24,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:11:24,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:11:24,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:11:24,968 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:11:24,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:11:24,968 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:11:24,968 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:11:24,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:11:24,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:11:24,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:11:24,969 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_97a48a03-951f-4e20-8dc5-fc42fe70b69a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b85d52a1932fa85f97c362ca60a681b550e6be8c5a2b0a8b0363e5b8a5a0a447 [2022-11-03 04:11:25,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:11:25,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:11:25,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:11:25,315 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:11:25,316 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:11:25,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b02.c [2022-11-03 04:11:25,395 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/data/e2f227c54/1ff1b164bdfd41fbbb813516c2ca23e6/FLAGcc1c4d1f4 [2022-11-03 04:11:25,898 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:11:25,904 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b02.c [2022-11-03 04:11:25,912 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/data/e2f227c54/1ff1b164bdfd41fbbb813516c2ca23e6/FLAGcc1c4d1f4 [2022-11-03 04:11:26,225 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/data/e2f227c54/1ff1b164bdfd41fbbb813516c2ca23e6 [2022-11-03 04:11:26,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:11:26,232 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:11:26,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:11:26,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:11:26,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:11:26,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:11:26" (1/1) ... [2022-11-03 04:11:26,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f5c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:26, skipping insertion in model container [2022-11-03 04:11:26,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:11:26" (1/1) ... [2022-11-03 04:11:26,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:11:26,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:11:26,468 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_97a48a03-951f-4e20-8dc5-fc42fe70b69a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b02.c[1107,1120] [2022-11-03 04:11:26,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:11:26,584 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:11:26,594 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_97a48a03-951f-4e20-8dc5-fc42fe70b69a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b02.c[1107,1120] [2022-11-03 04:11:26,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:11:26,657 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:11:26,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:26 WrapperNode [2022-11-03 04:11:26,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:11:26,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:11:26,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:11:26,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:11:26,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:26" (1/1) ... [2022-11-03 04:11:26,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:26" (1/1) ... [2022-11-03 04:11:26,726 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 350 [2022-11-03 04:11:26,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:11:26,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:11:26,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:11:26,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:11:26,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:26" (1/1) ... [2022-11-03 04:11:26,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:26" (1/1) ... [2022-11-03 04:11:26,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:26" (1/1) ... [2022-11-03 04:11:26,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:26" (1/1) ... [2022-11-03 04:11:26,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:26" (1/1) ... [2022-11-03 04:11:26,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:26" (1/1) ... [2022-11-03 04:11:26,807 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:26" (1/1) ... [2022-11-03 04:11:26,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:26" (1/1) ... [2022-11-03 04:11:26,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:11:26,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:11:26,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:11:26,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:11:26,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:26" (1/1) ... [2022-11-03 04:11:26,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:11:26,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:11:26,867 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:11:26,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:11:26,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:11:26,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:11:27,051 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:11:27,053 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:11:27,837 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:11:28,313 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:11:28,313 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:11:28,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:11:28 BoogieIcfgContainer [2022-11-03 04:11:28,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:11:28,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:11:28,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:11:28,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:11:28,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:11:26" (1/3) ... [2022-11-03 04:11:28,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f6840c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:11:28, skipping insertion in model container [2022-11-03 04:11:28,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:26" (2/3) ... [2022-11-03 04:11:28,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f6840c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:11:28, skipping insertion in model container [2022-11-03 04:11:28,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:11:28" (3/3) ... [2022-11-03 04:11:28,327 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_b02.c [2022-11-03 04:11:28,348 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:11:28,349 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:11:28,403 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:11:28,410 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;@5cfb918a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:11:28,410 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:11:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:28,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 04:11:28,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:28,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 04:11:28,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:28,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:28,427 INFO L85 PathProgramCache]: Analyzing trace with hash 5998019, now seen corresponding path program 1 times [2022-11-03 04:11:28,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:11:28,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675136319] [2022-11-03 04:11:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:28,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:11:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:11:28,755 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 04:11:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 04:11:28,956 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 04:11:28,958 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 04:11:28,959 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 04:11:28,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:11:28,965 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 04:11:28,970 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 04:11:28,996 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 04:11:29,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:11:29 BoogieIcfgContainer [2022-11-03 04:11:29,008 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 04:11:29,011 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 04:11:29,011 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 04:11:29,011 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 04:11:29,012 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:11:28" (3/4) ... [2022-11-03 04:11:29,015 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 04:11:29,016 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 04:11:29,017 INFO L158 Benchmark]: Toolchain (without parser) took 2784.83ms. Allocated memory is still 153.1MB. Free memory was 119.6MB in the beginning and 87.2MB in the end (delta: 32.4MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. [2022-11-03 04:11:29,017 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 90.2MB. Free memory was 44.6MB in the beginning and 44.6MB in the end (delta: 40.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:11:29,018 INFO L158 Benchmark]: CACSL2BoogieTranslator took 421.36ms. Allocated memory is still 153.1MB. Free memory was 119.2MB in the beginning and 123.5MB in the end (delta: -4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 04:11:29,018 INFO L158 Benchmark]: Boogie Procedure Inliner took 80.42ms. Allocated memory is still 153.1MB. Free memory was 123.5MB in the beginning and 118.3MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 04:11:29,019 INFO L158 Benchmark]: Boogie Preprocessor took 97.01ms. Allocated memory is still 153.1MB. Free memory was 118.3MB in the beginning and 115.1MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 04:11:29,020 INFO L158 Benchmark]: RCFGBuilder took 1478.48ms. Allocated memory is still 153.1MB. Free memory was 115.1MB in the beginning and 118.6MB in the end (delta: -3.5MB). Peak memory consumption was 82.5MB. Max. memory is 16.1GB. [2022-11-03 04:11:29,020 INFO L158 Benchmark]: TraceAbstraction took 690.54ms. Allocated memory is still 153.1MB. Free memory was 118.6MB in the beginning and 87.2MB in the end (delta: 31.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2022-11-03 04:11:29,020 INFO L158 Benchmark]: Witness Printer took 5.30ms. Allocated memory is still 153.1MB. Free memory was 87.2MB in the beginning and 87.2MB in the end (delta: 2.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 04:11:29,027 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 90.2MB. Free memory was 44.6MB in the beginning and 44.6MB in the end (delta: 40.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 421.36ms. Allocated memory is still 153.1MB. Free memory was 119.2MB in the beginning and 123.5MB in the end (delta: -4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 80.42ms. Allocated memory is still 153.1MB. Free memory was 123.5MB in the beginning and 118.3MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 97.01ms. Allocated memory is still 153.1MB. Free memory was 118.3MB in the beginning and 115.1MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1478.48ms. Allocated memory is still 153.1MB. Free memory was 115.1MB in the beginning and 118.6MB in the end (delta: -3.5MB). Peak memory consumption was 82.5MB. Max. memory is 16.1GB. * TraceAbstraction took 690.54ms. Allocated memory is still 153.1MB. Free memory was 118.6MB in the beginning and 87.2MB in the end (delta: 31.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Witness Printer took 5.30ms. Allocated memory is still 153.1MB. Free memory was 87.2MB in the beginning and 87.2MB in the end (delta: 2.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 78, overapproximation of bitwiseOr at line 87, overapproximation of bitwiseAnd at line 72. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_7 mask_SORT_7 = (SORT_7)-1 >> (sizeof(SORT_7) * 8 - 32); [L29] const SORT_7 msb_SORT_7 = (SORT_7)1 << (32 - 1); [L31] const SORT_12 mask_SORT_12 = (SORT_12)-1 >> (sizeof(SORT_12) * 8 - 3); [L32] const SORT_12 msb_SORT_12 = (SORT_12)1 << (3 - 1); [L34] const SORT_47 mask_SORT_47 = (SORT_47)-1 >> (sizeof(SORT_47) * 8 - 2); [L35] const SORT_47 msb_SORT_47 = (SORT_47)1 << (2 - 1); [L37] const SORT_1 var_4 = 0; [L38] const SORT_7 var_9 = 1; [L39] const SORT_12 var_13 = 0; [L40] const SORT_1 var_21 = 1; [L41] const SORT_12 var_28 = 2; [L42] const SORT_12 var_31 = 1; [L43] const SORT_12 var_35 = 4; [L44] const SORT_12 var_38 = 6; [L45] const SORT_12 var_41 = 5; [L46] const SORT_12 var_45 = 3; [L47] const SORT_7 var_57 = 0; [L49] SORT_1 input_2; [L50] SORT_1 input_3; [L51] SORT_12 input_55; [L52] SORT_12 input_62; [L53] SORT_12 input_75; [L55] SORT_1 state_5 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L56] SORT_12 state_14 = __VERIFIER_nondet_uchar() & mask_SORT_12; [L58] SORT_1 init_6_arg_1 = var_4; [L59] state_5 = init_6_arg_1 [L60] SORT_12 init_15_arg_1 = var_13; [L61] state_14 = init_15_arg_1 VAL [init_15_arg_1=0, init_6_arg_1=0, mask_SORT_1=1, mask_SORT_12=7, mask_SORT_47=3, mask_SORT_7=4294967295, msb_SORT_1=1, msb_SORT_12=4, msb_SORT_47=2, msb_SORT_7=2147483648, state_14=0, state_5=0, var_13=0, var_21=1, var_28=2, var_31=1, var_35=4, var_38=6, var_4=0, var_41=5, var_45=3, var_57=0, var_9=1] [L64] input_2 = __VERIFIER_nondet_uchar() [L65] input_3 = __VERIFIER_nondet_uchar() [L66] input_55 = __VERIFIER_nondet_uchar() [L67] input_62 = __VERIFIER_nondet_uchar() [L68] input_75 = __VERIFIER_nondet_uchar() [L71] SORT_1 var_8_arg_0 = state_5; [L72] var_8_arg_0 = var_8_arg_0 & mask_SORT_1 [L73] SORT_7 var_8 = var_8_arg_0; [L74] SORT_7 var_10_arg_0 = var_8; [L75] SORT_7 var_10_arg_1 = var_9; [L76] SORT_1 var_10 = var_10_arg_0 == var_10_arg_1; [L77] SORT_1 var_11_arg_0 = var_10; [L78] SORT_1 var_11 = ~var_11_arg_0; [L79] SORT_12 var_16_arg_0 = state_14; [L80] var_16_arg_0 = var_16_arg_0 & mask_SORT_12 [L81] SORT_7 var_16 = var_16_arg_0; [L82] SORT_7 var_17_arg_0 = var_16; [L83] SORT_7 var_17_arg_1 = var_9; [L84] SORT_1 var_17 = var_17_arg_0 == var_17_arg_1; [L85] SORT_1 var_18_arg_0 = var_11; [L86] SORT_1 var_18_arg_1 = var_17; [L87] SORT_1 var_18 = var_18_arg_0 | var_18_arg_1; [L88] SORT_1 var_22_arg_0 = var_18; [L89] SORT_1 var_22 = ~var_22_arg_0; [L90] SORT_1 var_23_arg_0 = var_21; [L91] SORT_1 var_23_arg_1 = var_22; [L92] SORT_1 var_23 = var_23_arg_0 & var_23_arg_1; [L93] var_23 = var_23 & mask_SORT_1 [L94] SORT_1 bad_24_arg_0 = var_23; [L95] CALL __VERIFIER_assert(!(bad_24_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 04:11:29,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/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_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/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 64bit --witnessprinter.graph.data.programhash b85d52a1932fa85f97c362ca60a681b550e6be8c5a2b0a8b0363e5b8a5a0a447 --- 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 04:11:31,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:11:31,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:11:31,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:11:31,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:11:31,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:11:31,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:11:31,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:11:31,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:11:31,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:11:31,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:11:31,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:11:31,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:11:31,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:11:31,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:11:31,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:11:31,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:11:31,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:11:31,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:11:31,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:11:31,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:11:31,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:11:31,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:11:31,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:11:31,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:11:31,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:11:31,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:11:31,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:11:31,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:11:31,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:11:31,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:11:31,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:11:31,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:11:31,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:11:31,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:11:31,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:11:31,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:11:31,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:11:31,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:11:31,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:11:31,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:11:31,436 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 04:11:31,465 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:11:31,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:11:31,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:11:31,466 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:11:31,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:11:31,467 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:11:31,467 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:11:31,467 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:11:31,467 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:11:31,468 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:11:31,468 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:11:31,468 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:11:31,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:11:31,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:11:31,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:11:31,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:11:31,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:11:31,470 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 04:11:31,470 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 04:11:31,471 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 04:11:31,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:11:31,471 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:11:31,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:11:31,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:11:31,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 04:11:31,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:11:31,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:11:31,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:11:31,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:11:31,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:11:31,473 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 04:11:31,473 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:31,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:11:31,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:11:31,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 04:11:31,474 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_97a48a03-951f-4e20-8dc5-fc42fe70b69a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b85d52a1932fa85f97c362ca60a681b550e6be8c5a2b0a8b0363e5b8a5a0a447 [2022-11-03 04:11:31,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:11:31,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:11:31,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:11:31,898 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:11:31,898 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:11:31,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b02.c [2022-11-03 04:11:31,993 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/data/5183689ef/b492bb5a91c3420997d59d9567db61df/FLAG152ffceb4 [2022-11-03 04:11:32,568 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:11:32,569 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b02.c [2022-11-03 04:11:32,588 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/data/5183689ef/b492bb5a91c3420997d59d9567db61df/FLAG152ffceb4 [2022-11-03 04:11:32,889 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/data/5183689ef/b492bb5a91c3420997d59d9567db61df [2022-11-03 04:11:32,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:11:32,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:11:32,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:11:32,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:11:32,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:11:32,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:11:32" (1/1) ... [2022-11-03 04:11:32,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f22db82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:32, skipping insertion in model container [2022-11-03 04:11:32,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:11:32" (1/1) ... [2022-11-03 04:11:32,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:11:32,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:11:33,106 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_97a48a03-951f-4e20-8dc5-fc42fe70b69a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b02.c[1107,1120] [2022-11-03 04:11:33,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:11:33,196 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:11:33,252 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_97a48a03-951f-4e20-8dc5-fc42fe70b69a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.h_b02.c[1107,1120] [2022-11-03 04:11:33,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:11:33,321 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:11:33,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:33 WrapperNode [2022-11-03 04:11:33,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:11:33,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:11:33,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:11:33,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:11:33,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:33" (1/1) ... [2022-11-03 04:11:33,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:33" (1/1) ... [2022-11-03 04:11:33,373 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 350 [2022-11-03 04:11:33,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:11:33,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:11:33,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:11:33,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:11:33,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:33" (1/1) ... [2022-11-03 04:11:33,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:33" (1/1) ... [2022-11-03 04:11:33,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:33" (1/1) ... [2022-11-03 04:11:33,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:33" (1/1) ... [2022-11-03 04:11:33,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:33" (1/1) ... [2022-11-03 04:11:33,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:33" (1/1) ... [2022-11-03 04:11:33,424 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:33" (1/1) ... [2022-11-03 04:11:33,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:33" (1/1) ... [2022-11-03 04:11:33,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:11:33,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:11:33,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:11:33,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:11:33,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:33" (1/1) ... [2022-11-03 04:11:33,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:11:33,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:11:33,478 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:11:33,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:11:33,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:11:33,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:11:33,655 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:11:33,657 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:11:34,241 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:11:34,250 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:11:34,250 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 04:11:34,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:11:34 BoogieIcfgContainer [2022-11-03 04:11:34,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:11:34,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:11:34,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:11:34,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:11:34,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:11:32" (1/3) ... [2022-11-03 04:11:34,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc3718d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:11:34, skipping insertion in model container [2022-11-03 04:11:34,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:11:33" (2/3) ... [2022-11-03 04:11:34,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cc3718d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:11:34, skipping insertion in model container [2022-11-03 04:11:34,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:11:34" (3/3) ... [2022-11-03 04:11:34,265 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.h_b02.c [2022-11-03 04:11:34,284 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:11:34,284 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:11:34,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:11:34,390 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;@629f9c02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:11:34,390 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:11:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 49 states have (on average 1.489795918367347) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 04:11:34,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:34,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 04:11:34,403 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:34,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:34,414 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 04:11:34,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:34,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260470466] [2022-11-03 04:11:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:34,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:34,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:34,434 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:34,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 04:11:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:34,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:11:34,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:34,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:34,781 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:34,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260470466] [2022-11-03 04:11:34,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260470466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:34,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:34,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:34,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457693843] [2022-11-03 04:11:34,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:34,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:34,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:34,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:34,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:34,827 INFO L87 Difference]: Start difference. First operand has 51 states, 49 states have (on average 1.489795918367347) internal successors, (73), 50 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:34,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:34,962 INFO L93 Difference]: Finished difference Result 140 states and 210 transitions. [2022-11-03 04:11:34,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:34,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 04:11:34,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:34,978 INFO L225 Difference]: With dead ends: 140 [2022-11-03 04:11:34,978 INFO L226 Difference]: Without dead ends: 91 [2022-11-03 04:11:34,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:34,987 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 124 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:34,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 182 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-03 04:11:35,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 49. [2022-11-03 04:11:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2022-11-03 04:11:35,042 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 5 [2022-11-03 04:11:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:35,043 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2022-11-03 04:11:35,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2022-11-03 04:11:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:35,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:35,046 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:35,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:35,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:35,258 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:35,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1221802023, now seen corresponding path program 1 times [2022-11-03 04:11:35,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:35,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077655214] [2022-11-03 04:11:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:35,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:35,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:35,267 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:35,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 04:11:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:35,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:35,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:35,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:35,522 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:35,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077655214] [2022-11-03 04:11:35,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077655214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:35,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:35,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:35,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841503459] [2022-11-03 04:11:35,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:35,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:35,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:35,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:35,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:35,526 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:35,628 INFO L93 Difference]: Finished difference Result 179 states and 258 transitions. [2022-11-03 04:11:35,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:35,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:35,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:35,630 INFO L225 Difference]: With dead ends: 179 [2022-11-03 04:11:35,630 INFO L226 Difference]: Without dead ends: 134 [2022-11-03 04:11:35,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:35,632 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 180 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:35,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 228 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:35,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-03 04:11:35,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 51. [2022-11-03 04:11:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.42) internal successors, (71), 50 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2022-11-03 04:11:35,640 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 48 [2022-11-03 04:11:35,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:35,640 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2022-11-03 04:11:35,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:35,641 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2022-11-03 04:11:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:35,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:35,642 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:35,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:35,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:35,856 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2119195301, now seen corresponding path program 1 times [2022-11-03 04:11:35,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:35,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434727110] [2022-11-03 04:11:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:35,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:35,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:35,860 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:35,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 04:11:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:36,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:11:36,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:36,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:36,180 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:36,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434727110] [2022-11-03 04:11:36,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434727110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:36,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:36,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:36,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723814188] [2022-11-03 04:11:36,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:36,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:36,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:36,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:36,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:36,188 INFO L87 Difference]: Start difference. First operand 51 states and 71 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:36,340 INFO L93 Difference]: Finished difference Result 184 states and 262 transitions. [2022-11-03 04:11:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:36,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:36,342 INFO L225 Difference]: With dead ends: 184 [2022-11-03 04:11:36,343 INFO L226 Difference]: Without dead ends: 139 [2022-11-03 04:11:36,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:36,344 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 237 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:36,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 344 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-03 04:11:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 55. [2022-11-03 04:11:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 54 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2022-11-03 04:11:36,352 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 48 [2022-11-03 04:11:36,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:36,352 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2022-11-03 04:11:36,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2022-11-03 04:11:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:36,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:36,354 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:36,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-03 04:11:36,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:36,566 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:36,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:36,567 INFO L85 PathProgramCache]: Analyzing trace with hash 330404829, now seen corresponding path program 1 times [2022-11-03 04:11:36,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:36,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303870458] [2022-11-03 04:11:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:36,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:36,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:36,572 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:36,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 04:11:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:36,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:36,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:36,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:36,837 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:36,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303870458] [2022-11-03 04:11:36,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303870458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:36,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:36,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:36,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979474913] [2022-11-03 04:11:36,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:36,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:36,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:36,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:36,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:36,840 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:36,929 INFO L93 Difference]: Finished difference Result 179 states and 256 transitions. [2022-11-03 04:11:36,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:36,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:36,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:36,931 INFO L225 Difference]: With dead ends: 179 [2022-11-03 04:11:36,931 INFO L226 Difference]: Without dead ends: 134 [2022-11-03 04:11:36,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:36,933 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 163 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:36,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 229 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:36,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-03 04:11:36,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 57. [2022-11-03 04:11:36,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2022-11-03 04:11:36,940 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 48 [2022-11-03 04:11:36,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:36,941 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2022-11-03 04:11:36,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:36,942 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2022-11-03 04:11:36,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:36,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:36,943 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:36,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:37,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:37,155 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:37,156 INFO L85 PathProgramCache]: Analyzing trace with hash 989936351, now seen corresponding path program 1 times [2022-11-03 04:11:37,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:37,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667491560] [2022-11-03 04:11:37,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:37,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:37,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:37,163 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:37,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 04:11:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:37,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:11:37,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:37,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:37,504 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:37,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667491560] [2022-11-03 04:11:37,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667491560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:37,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:37,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:37,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724109158] [2022-11-03 04:11:37,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:37,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:37,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:37,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:37,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:37,507 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:37,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:37,627 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2022-11-03 04:11:37,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:37,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:37,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:37,629 INFO L225 Difference]: With dead ends: 190 [2022-11-03 04:11:37,629 INFO L226 Difference]: Without dead ends: 145 [2022-11-03 04:11:37,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:37,630 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 229 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:37,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 341 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:37,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-03 04:11:37,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 61. [2022-11-03 04:11:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 60 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 83 transitions. [2022-11-03 04:11:37,647 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 83 transitions. Word has length 48 [2022-11-03 04:11:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:37,647 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 83 transitions. [2022-11-03 04:11:37,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 83 transitions. [2022-11-03 04:11:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:37,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:37,649 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:37,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:37,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:37,850 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:37,850 INFO L85 PathProgramCache]: Analyzing trace with hash 917549793, now seen corresponding path program 1 times [2022-11-03 04:11:37,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:37,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162005708] [2022-11-03 04:11:37,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:37,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:37,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:37,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:37,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 04:11:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:38,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 04:11:38,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:38,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:38,217 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:38,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162005708] [2022-11-03 04:11:38,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162005708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:38,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:38,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:38,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684077143] [2022-11-03 04:11:38,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:38,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:38,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:38,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:38,220 INFO L87 Difference]: Start difference. First operand 61 states and 83 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:38,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:38,366 INFO L93 Difference]: Finished difference Result 184 states and 259 transitions. [2022-11-03 04:11:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:38,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:38,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:38,367 INFO L225 Difference]: With dead ends: 184 [2022-11-03 04:11:38,367 INFO L226 Difference]: Without dead ends: 139 [2022-11-03 04:11:38,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:38,369 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 209 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:38,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 325 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-03 04:11:38,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 63. [2022-11-03 04:11:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 62 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2022-11-03 04:11:38,374 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 48 [2022-11-03 04:11:38,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:38,375 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2022-11-03 04:11:38,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:38,375 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2022-11-03 04:11:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:38,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:38,376 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:38,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:38,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:38,593 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:38,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1619149667, now seen corresponding path program 1 times [2022-11-03 04:11:38,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:38,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196993156] [2022-11-03 04:11:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:38,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:38,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:38,597 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:38,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 04:11:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:38,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:38,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:38,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:38,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:38,897 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:38,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196993156] [2022-11-03 04:11:38,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196993156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:38,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:38,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:38,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373626248] [2022-11-03 04:11:38,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:38,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:38,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:38,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:38,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:38,900 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:39,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:39,012 INFO L93 Difference]: Finished difference Result 198 states and 279 transitions. [2022-11-03 04:11:39,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:39,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:39,013 INFO L225 Difference]: With dead ends: 198 [2022-11-03 04:11:39,013 INFO L226 Difference]: Without dead ends: 153 [2022-11-03 04:11:39,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:39,014 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 220 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:39,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 339 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-03 04:11:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 69. [2022-11-03 04:11:39,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3676470588235294) internal successors, (93), 68 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2022-11-03 04:11:39,020 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 48 [2022-11-03 04:11:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:39,020 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2022-11-03 04:11:39,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:39,020 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2022-11-03 04:11:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:39,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:39,021 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:39,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:39,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:39,222 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:39,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:39,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1759698277, now seen corresponding path program 1 times [2022-11-03 04:11:39,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:39,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502461819] [2022-11-03 04:11:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:39,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:39,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:39,224 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:39,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 04:11:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:39,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:39,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:39,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:39,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:39,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502461819] [2022-11-03 04:11:39,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502461819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:39,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:39,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:39,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338911335] [2022-11-03 04:11:39,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:39,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:39,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:39,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:39,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:39,498 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:39,623 INFO L93 Difference]: Finished difference Result 198 states and 278 transitions. [2022-11-03 04:11:39,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:39,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:39,625 INFO L225 Difference]: With dead ends: 198 [2022-11-03 04:11:39,625 INFO L226 Difference]: Without dead ends: 153 [2022-11-03 04:11:39,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:39,626 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 213 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:39,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 335 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-03 04:11:39,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 71. [2022-11-03 04:11:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3571428571428572) internal successors, (95), 70 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-11-03 04:11:39,633 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 48 [2022-11-03 04:11:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:39,633 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-11-03 04:11:39,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:39,633 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-11-03 04:11:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:39,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:39,639 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:39,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:39,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:39,865 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:39,865 INFO L85 PathProgramCache]: Analyzing trace with hash -45740057, now seen corresponding path program 1 times [2022-11-03 04:11:39,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:39,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738586818] [2022-11-03 04:11:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:39,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:39,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:39,867 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:39,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 04:11:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:40,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:11:40,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:40,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:40,234 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:40,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738586818] [2022-11-03 04:11:40,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738586818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:40,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:40,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:40,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190161518] [2022-11-03 04:11:40,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:40,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:40,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:40,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:40,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:40,236 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:40,364 INFO L93 Difference]: Finished difference Result 198 states and 277 transitions. [2022-11-03 04:11:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:40,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:40,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:40,367 INFO L225 Difference]: With dead ends: 198 [2022-11-03 04:11:40,367 INFO L226 Difference]: Without dead ends: 153 [2022-11-03 04:11:40,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:40,368 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 206 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:40,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 329 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-03 04:11:40,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 73. [2022-11-03 04:11:40,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 72 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 97 transitions. [2022-11-03 04:11:40,373 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 97 transitions. Word has length 48 [2022-11-03 04:11:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:40,373 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 97 transitions. [2022-11-03 04:11:40,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 97 transitions. [2022-11-03 04:11:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:40,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:40,374 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:40,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:40,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:40,600 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:40,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:40,600 INFO L85 PathProgramCache]: Analyzing trace with hash 376961769, now seen corresponding path program 1 times [2022-11-03 04:11:40,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:40,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843522705] [2022-11-03 04:11:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:40,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:40,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:40,602 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:40,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 04:11:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:40,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:40,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:40,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:40,884 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:40,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843522705] [2022-11-03 04:11:40,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843522705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:40,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:40,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:40,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509218611] [2022-11-03 04:11:40,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:40,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:40,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:40,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:40,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:40,888 INFO L87 Difference]: Start difference. First operand 73 states and 97 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:40,992 INFO L93 Difference]: Finished difference Result 208 states and 291 transitions. [2022-11-03 04:11:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:40,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:40,994 INFO L225 Difference]: With dead ends: 208 [2022-11-03 04:11:40,994 INFO L226 Difference]: Without dead ends: 163 [2022-11-03 04:11:40,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:40,995 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 212 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:40,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 339 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-03 04:11:40,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 77. [2022-11-03 04:11:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.3421052631578947) internal successors, (102), 76 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2022-11-03 04:11:41,000 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 48 [2022-11-03 04:11:41,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:41,001 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2022-11-03 04:11:41,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2022-11-03 04:11:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:41,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:41,002 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:41,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:41,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:41,202 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:41,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:41,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1211386133, now seen corresponding path program 1 times [2022-11-03 04:11:41,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:41,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849354536] [2022-11-03 04:11:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:41,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:41,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:41,205 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:41,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 04:11:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:41,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:41,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:41,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:41,514 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:41,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849354536] [2022-11-03 04:11:41,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849354536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:41,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:41,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:41,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895555130] [2022-11-03 04:11:41,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:41,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:41,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:41,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:41,515 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:41,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:41,629 INFO L93 Difference]: Finished difference Result 212 states and 296 transitions. [2022-11-03 04:11:41,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:41,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:41,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:41,631 INFO L225 Difference]: With dead ends: 212 [2022-11-03 04:11:41,631 INFO L226 Difference]: Without dead ends: 167 [2022-11-03 04:11:41,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:41,632 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 207 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:41,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 333 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-03 04:11:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 81. [2022-11-03 04:11:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3375) internal successors, (107), 80 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2022-11-03 04:11:41,637 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 48 [2022-11-03 04:11:41,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:41,637 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2022-11-03 04:11:41,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:41,638 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2022-11-03 04:11:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:41,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:41,638 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:41,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:41,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:41,850 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:41,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1798192147, now seen corresponding path program 1 times [2022-11-03 04:11:41,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:41,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082393028] [2022-11-03 04:11:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:41,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:41,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:41,852 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:41,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 04:11:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:42,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:11:42,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:42,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:42,173 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:42,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082393028] [2022-11-03 04:11:42,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082393028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:42,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:42,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:42,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541572553] [2022-11-03 04:11:42,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:42,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:42,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:42,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:42,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:42,175 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:42,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:42,279 INFO L93 Difference]: Finished difference Result 208 states and 289 transitions. [2022-11-03 04:11:42,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:42,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:42,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:42,281 INFO L225 Difference]: With dead ends: 208 [2022-11-03 04:11:42,281 INFO L226 Difference]: Without dead ends: 163 [2022-11-03 04:11:42,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:42,282 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 193 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:42,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 328 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:42,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-03 04:11:42,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 83. [2022-11-03 04:11:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.329268292682927) internal successors, (109), 82 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2022-11-03 04:11:42,287 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 48 [2022-11-03 04:11:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:42,287 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2022-11-03 04:11:42,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2022-11-03 04:11:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:42,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:42,289 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:42,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:42,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:42,509 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:42,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1097127569, now seen corresponding path program 1 times [2022-11-03 04:11:42,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:42,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878792632] [2022-11-03 04:11:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:42,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:42,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:42,511 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:42,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 04:11:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:42,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:11:42,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:42,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:42,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:42,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878792632] [2022-11-03 04:11:42,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878792632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:42,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:42,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:11:42,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464036073] [2022-11-03 04:11:42,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:42,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:11:42,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:42,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:11:42,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:11:42,858 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:42,936 INFO L93 Difference]: Finished difference Result 174 states and 240 transitions. [2022-11-03 04:11:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:11:42,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:42,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:42,938 INFO L225 Difference]: With dead ends: 174 [2022-11-03 04:11:42,938 INFO L226 Difference]: Without dead ends: 129 [2022-11-03 04:11:42,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:42,938 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 77 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:42,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 214 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:42,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-03 04:11:42,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 85. [2022-11-03 04:11:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.3214285714285714) internal successors, (111), 84 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 111 transitions. [2022-11-03 04:11:42,944 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 111 transitions. Word has length 48 [2022-11-03 04:11:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:42,945 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 111 transitions. [2022-11-03 04:11:42,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:42,945 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 111 transitions. [2022-11-03 04:11:42,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:42,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:42,946 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:42,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:43,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:43,158 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:43,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:43,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1777185939, now seen corresponding path program 1 times [2022-11-03 04:11:43,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:43,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980667056] [2022-11-03 04:11:43,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:43,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:43,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:43,160 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:43,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 04:11:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:43,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 04:11:43,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:43,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:43,609 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:43,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980667056] [2022-11-03 04:11:43,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980667056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:43,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:43,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:43,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284695014] [2022-11-03 04:11:43,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:43,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:43,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:43,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:43,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:43,611 INFO L87 Difference]: Start difference. First operand 85 states and 111 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:43,725 INFO L93 Difference]: Finished difference Result 208 states and 287 transitions. [2022-11-03 04:11:43,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:43,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:43,726 INFO L225 Difference]: With dead ends: 208 [2022-11-03 04:11:43,726 INFO L226 Difference]: Without dead ends: 163 [2022-11-03 04:11:43,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:43,727 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 179 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:43,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 316 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-03 04:11:43,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 87. [2022-11-03 04:11:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.313953488372093) internal successors, (113), 86 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 113 transitions. [2022-11-03 04:11:43,731 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 113 transitions. Word has length 48 [2022-11-03 04:11:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:43,732 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 113 transitions. [2022-11-03 04:11:43,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:43,732 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 113 transitions. [2022-11-03 04:11:43,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:43,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:43,732 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:43,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:43,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:43,933 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:43,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2178577, now seen corresponding path program 1 times [2022-11-03 04:11:43,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:43,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683126388] [2022-11-03 04:11:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:43,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:43,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:43,935 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:43,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 04:11:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:44,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 04:11:44,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:44,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:11:44,500 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:44,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683126388] [2022-11-03 04:11:44,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683126388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:11:44,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:11:44,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:11:44,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404817269] [2022-11-03 04:11:44,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:11:44,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:11:44,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:44,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:11:44,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:11:44,502 INFO L87 Difference]: Start difference. First operand 87 states and 113 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:44,654 INFO L93 Difference]: Finished difference Result 198 states and 271 transitions. [2022-11-03 04:11:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:11:44,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:44,657 INFO L225 Difference]: With dead ends: 198 [2022-11-03 04:11:44,657 INFO L226 Difference]: Without dead ends: 153 [2022-11-03 04:11:44,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:11:44,658 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 152 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:44,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 295 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:11:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-03 04:11:44,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 89. [2022-11-03 04:11:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.3068181818181819) internal successors, (115), 88 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 115 transitions. [2022-11-03 04:11:44,662 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 115 transitions. Word has length 48 [2022-11-03 04:11:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:44,662 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 115 transitions. [2022-11-03 04:11:44,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 115 transitions. [2022-11-03 04:11:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 04:11:44,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:44,663 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:44,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:44,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:11:44,873 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:44,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:44,874 INFO L85 PathProgramCache]: Analyzing trace with hash -331535, now seen corresponding path program 1 times [2022-11-03 04:11:44,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:44,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900999679] [2022-11-03 04:11:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:44,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:44,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:44,875 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:44,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 04:11:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 04:11:45,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:45,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:46,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:46,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900999679] [2022-11-03 04:11:46,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900999679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:46,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1691464447] [2022-11-03 04:11:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:46,857 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:46,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:46,864 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:46,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 04:11:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:47,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 04:11:47,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:47,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:48,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1691464447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:48,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681606227] [2022-11-03 04:11:48,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:48,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:11:48,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:11:48,124 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:11:48,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 04:11:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:48,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 04:11:48,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:49,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:50,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681606227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:50,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:11:50,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 13, 13] total 40 [2022-11-03 04:11:50,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399972701] [2022-11-03 04:11:50,306 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:11:50,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 04:11:50,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:50,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 04:11:50,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1460, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 04:11:50,308 INFO L87 Difference]: Start difference. First operand 89 states and 115 transitions. Second operand has 40 states, 40 states have (on average 4.6) internal successors, (184), 40 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:52,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:11:52,321 INFO L93 Difference]: Finished difference Result 184 states and 242 transitions. [2022-11-03 04:11:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-03 04:11:52,324 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.6) internal successors, (184), 40 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-03 04:11:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:11:52,325 INFO L225 Difference]: With dead ends: 184 [2022-11-03 04:11:52,325 INFO L226 Difference]: Without dead ends: 182 [2022-11-03 04:11:52,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=506, Invalid=4186, Unknown=0, NotChecked=0, Total=4692 [2022-11-03 04:11:52,331 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 849 mSDsluCounter, 2289 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 2396 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 833 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:11:52,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 2396 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 269 Invalid, 0 Unknown, 833 Unchecked, 0.4s Time] [2022-11-03 04:11:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-03 04:11:52,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 92. [2022-11-03 04:11:52,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 118 transitions. [2022-11-03 04:11:52,340 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 118 transitions. Word has length 48 [2022-11-03 04:11:52,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:11:52,340 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 118 transitions. [2022-11-03 04:11:52,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.6) internal successors, (184), 40 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:11:52,341 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 118 transitions. [2022-11-03 04:11:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 04:11:52,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:11:52,342 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:11:52,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:52,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:52,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 04:11:52,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:52,968 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:11:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:11:52,969 INFO L85 PathProgramCache]: Analyzing trace with hash -216166799, now seen corresponding path program 1 times [2022-11-03 04:11:52,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:11:52,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447935623] [2022-11-03 04:11:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:52,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:11:52,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:11:52,970 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:11:52,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 04:11:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:53,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:11:53,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:53,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:53,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:11:53,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447935623] [2022-11-03 04:11:53,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447935623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:53,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [567383797] [2022-11-03 04:11:53,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:53,839 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:11:53,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:11:53,840 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:11:53,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 04:11:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:54,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:11:54,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:54,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:55,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [567383797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:55,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676231684] [2022-11-03 04:11:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:11:55,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:11:55,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:11:55,231 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:11:55,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 04:11:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:11:55,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:11:55,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:11:55,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:11:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:11:56,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676231684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:11:56,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:11:56,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13, 11, 6, 6] total 43 [2022-11-03 04:11:56,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489282534] [2022-11-03 04:11:56,172 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:11:56,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 04:11:56,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:11:56,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 04:11:56,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1664, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 04:11:56,175 INFO L87 Difference]: Start difference. First operand 92 states and 118 transitions. Second operand has 43 states, 43 states have (on average 7.72093023255814) internal successors, (332), 43 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:03,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:03,173 INFO L93 Difference]: Finished difference Result 713 states and 997 transitions. [2022-11-03 04:12:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-03 04:12:03,174 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 7.72093023255814) internal successors, (332), 43 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-03 04:12:03,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:03,178 INFO L225 Difference]: With dead ends: 713 [2022-11-03 04:12:03,178 INFO L226 Difference]: Without dead ends: 668 [2022-11-03 04:12:03,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4029 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2941, Invalid=11821, Unknown=0, NotChecked=0, Total=14762 [2022-11-03 04:12:03,184 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 2362 mSDsluCounter, 4641 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2362 SdHoareTripleChecker+Valid, 4927 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:03,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2362 Valid, 4927 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1564 Invalid, 0 Unknown, 467 Unchecked, 1.6s Time] [2022-11-03 04:12:03,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-11-03 04:12:03,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 107. [2022-11-03 04:12:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.3018867924528301) internal successors, (138), 106 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 138 transitions. [2022-11-03 04:12:03,194 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 138 transitions. Word has length 91 [2022-11-03 04:12:03,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:03,195 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 138 transitions. [2022-11-03 04:12:03,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 7.72093023255814) internal successors, (332), 43 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:03,195 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 138 transitions. [2022-11-03 04:12:03,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 04:12:03,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:03,196 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 04:12:03,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:03,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:03,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-11-03 04:12:03,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:03,816 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:03,817 INFO L85 PathProgramCache]: Analyzing trace with hash -454028555, now seen corresponding path program 1 times [2022-11-03 04:12:03,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:03,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935369501] [2022-11-03 04:12:03,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:03,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:03,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:03,818 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:03,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 04:12:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:04,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 04:12:04,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:04,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:05,645 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935369501] [2022-11-03 04:12:05,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935369501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [293086839] [2022-11-03 04:12:05,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:05,646 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:05,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:05,647 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:05,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 04:12:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:06,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:12:06,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:06,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 39 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:07,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [293086839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:07,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641301309] [2022-11-03 04:12:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:07,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:07,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:07,439 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:07,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 04:12:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:07,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:12:07,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:12:08,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:12:08,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641301309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:08,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:12:08,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 13, 7, 7] total 46 [2022-11-03 04:12:08,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375795197] [2022-11-03 04:12:08,524 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:12:08,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 04:12:08,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:08,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 04:12:08,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 04:12:08,527 INFO L87 Difference]: Start difference. First operand 107 states and 138 transitions. Second operand has 46 states, 46 states have (on average 7.456521739130435) internal successors, (343), 46 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:22,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:12:22,222 INFO L93 Difference]: Finished difference Result 1266 states and 1775 transitions. [2022-11-03 04:12:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-11-03 04:12:22,223 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 7.456521739130435) internal successors, (343), 46 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-03 04:12:22,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:12:22,228 INFO L225 Difference]: With dead ends: 1266 [2022-11-03 04:12:22,228 INFO L226 Difference]: Without dead ends: 1173 [2022-11-03 04:12:22,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 497 SyntacticMatches, 8 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16067 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=7765, Invalid=40855, Unknown=0, NotChecked=0, Total=48620 [2022-11-03 04:12:22,237 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 2438 mSDsluCounter, 5248 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2438 SdHoareTripleChecker+Valid, 5307 SdHoareTripleChecker+Invalid, 1925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1099 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:12:22,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2438 Valid, 5307 Invalid, 1925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 765 Invalid, 0 Unknown, 1099 Unchecked, 0.8s Time] [2022-11-03 04:12:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2022-11-03 04:12:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 183. [2022-11-03 04:12:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.3461538461538463) internal successors, (245), 182 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 245 transitions. [2022-11-03 04:12:22,256 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 245 transitions. Word has length 91 [2022-11-03 04:12:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:12:22,256 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 245 transitions. [2022-11-03 04:12:22,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 7.456521739130435) internal successors, (343), 46 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:12:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 245 transitions. [2022-11-03 04:12:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 04:12:22,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:12:22,258 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 04:12:22,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 04:12:22,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-03 04:12:22,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-11-03 04:12:22,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:22,884 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:12:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:12:22,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2136120185, now seen corresponding path program 1 times [2022-11-03 04:12:22,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:12:22,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282306423] [2022-11-03 04:12:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:22,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:12:22,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:12:22,886 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:12:22,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 04:12:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:23,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 04:12:23,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:23,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:23,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:12:23,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282306423] [2022-11-03 04:12:23,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282306423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:23,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [355793402] [2022-11-03 04:12:23,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:23,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:12:23,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:12:23,703 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:12:23,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 04:12:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:24,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:12:24,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:24,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:12:25,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [355793402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:25,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270801953] [2022-11-03 04:12:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:12:25,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:12:25,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:12:25,765 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:12:25,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 04:12:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:12:25,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:12:25,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:12:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:12:26,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:12:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:12:26,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270801953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:12:26,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:12:26,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 14, 14, 7, 7] total 49 [2022-11-03 04:12:26,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560309111] [2022-11-03 04:12:26,866 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:12:26,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 04:12:26,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:12:26,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 04:12:26,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2231, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 04:12:26,869 INFO L87 Difference]: Start difference. First operand 183 states and 245 transitions. Second operand has 49 states, 49 states have (on average 7.979591836734694) internal successors, (391), 49 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:02,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:02,628 INFO L93 Difference]: Finished difference Result 2613 states and 3595 transitions. [2022-11-03 04:13:02,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2022-11-03 04:13:02,629 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 7.979591836734694) internal successors, (391), 49 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-03 04:13:02,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:02,636 INFO L225 Difference]: With dead ends: 2613 [2022-11-03 04:13:02,636 INFO L226 Difference]: Without dead ends: 2477 [2022-11-03 04:13:02,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1030 GetRequests, 631 SyntacticMatches, 59 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57184 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=16125, Invalid=100497, Unknown=0, NotChecked=0, Total=116622 [2022-11-03 04:13:02,648 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 5234 mSDsluCounter, 13591 mSDsCounter, 0 mSdLazyCounter, 4632 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5234 SdHoareTripleChecker+Valid, 14124 SdHoareTripleChecker+Invalid, 6301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 4632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1357 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:02,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5234 Valid, 14124 Invalid, 6301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 4632 Invalid, 0 Unknown, 1357 Unchecked, 4.3s Time] [2022-11-03 04:13:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2022-11-03 04:13:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 137. [2022-11-03 04:13:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.286764705882353) internal successors, (175), 136 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 175 transitions. [2022-11-03 04:13:02,671 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 175 transitions. Word has length 91 [2022-11-03 04:13:02,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:02,671 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 175 transitions. [2022-11-03 04:13:02,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 7.979591836734694) internal successors, (391), 49 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:02,672 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 175 transitions. [2022-11-03 04:13:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 04:13:02,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:02,673 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 04:13:02,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:02,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 04:13:03,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:03,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:13:03,296 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:03,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:03,297 INFO L85 PathProgramCache]: Analyzing trace with hash -653872261, now seen corresponding path program 1 times [2022-11-03 04:13:03,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:03,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164742254] [2022-11-03 04:13:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:03,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:03,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:03,299 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:03,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 04:13:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:03,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 04:13:03,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 31 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:04,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:13:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 31 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:07,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:07,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164742254] [2022-11-03 04:13:07,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164742254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:13:07,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [765345263] [2022-11-03 04:13:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:07,261 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:13:07,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:13:07,262 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:13:07,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 04:13:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:07,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:13:07,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:08,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:13:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:09,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [765345263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:13:09,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726618348] [2022-11-03 04:13:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:09,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:13:09,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:13:09,017 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:13:09,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 04:13:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:09,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:13:09,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:13:09,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:13:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 04:13:10,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726618348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:13:10,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:13:10,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14, 12, 8, 8] total 50 [2022-11-03 04:13:10,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626321629] [2022-11-03 04:13:10,357 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:13:10,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 04:13:10,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:10,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 04:13:10,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 04:13:10,361 INFO L87 Difference]: Start difference. First operand 137 states and 175 transitions. Second operand has 50 states, 50 states have (on average 7.68) internal successors, (384), 50 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:33,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:33,473 INFO L93 Difference]: Finished difference Result 1801 states and 2454 transitions. [2022-11-03 04:13:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-11-03 04:13:33,474 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 7.68) internal successors, (384), 50 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-03 04:13:33,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:33,478 INFO L225 Difference]: With dead ends: 1801 [2022-11-03 04:13:33,478 INFO L226 Difference]: Without dead ends: 1717 [2022-11-03 04:13:33,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19460 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=9046, Invalid=47360, Unknown=0, NotChecked=0, Total=56406 [2022-11-03 04:13:33,484 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 4201 mSDsluCounter, 7544 mSDsCounter, 0 mSdLazyCounter, 2816 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4201 SdHoareTripleChecker+Valid, 7791 SdHoareTripleChecker+Invalid, 4477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 2816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1324 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:33,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4201 Valid, 7791 Invalid, 4477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 2816 Invalid, 0 Unknown, 1324 Unchecked, 2.7s Time] [2022-11-03 04:13:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-11-03 04:13:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 159. [2022-11-03 04:13:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.2848101265822784) internal successors, (203), 158 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 203 transitions. [2022-11-03 04:13:33,503 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 203 transitions. Word has length 91 [2022-11-03 04:13:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:33,503 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 203 transitions. [2022-11-03 04:13:33,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 7.68) internal successors, (384), 50 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:33,504 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 203 transitions. [2022-11-03 04:13:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 04:13:33,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:33,505 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 04:13:33,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:33,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-03 04:13:33,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-03 04:13:34,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:13:34,109 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:34,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:34,110 INFO L85 PathProgramCache]: Analyzing trace with hash -977369853, now seen corresponding path program 1 times [2022-11-03 04:13:34,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:34,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457641039] [2022-11-03 04:13:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:34,111 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:34,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:34,112 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:34,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 04:13:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:34,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:13:34,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:34,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:13:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:35,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:13:35,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457641039] [2022-11-03 04:13:35,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457641039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:13:35,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1109976520] [2022-11-03 04:13:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:35,115 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:13:35,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:13:35,117 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:13:35,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 04:13:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:35,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:13:35,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:36,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:13:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:36,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1109976520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:13:36,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522550630] [2022-11-03 04:13:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:36,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:13:36,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:13:36,569 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:13:36,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 04:13:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:36,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:13:36,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 04:13:37,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:13:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 04:13:37,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522550630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:13:37,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:13:37,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14, 12, 8, 8] total 44 [2022-11-03 04:13:37,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619294821] [2022-11-03 04:13:37,819 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:13:37,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 04:13:37,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:13:37,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 04:13:37,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1743, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 04:13:37,821 INFO L87 Difference]: Start difference. First operand 159 states and 203 transitions. Second operand has 44 states, 44 states have (on average 7.909090909090909) internal successors, (348), 44 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:54,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:13:54,516 INFO L93 Difference]: Finished difference Result 1493 states and 2011 transitions. [2022-11-03 04:13:54,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-11-03 04:13:54,517 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 7.909090909090909) internal successors, (348), 44 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-03 04:13:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:13:54,521 INFO L225 Difference]: With dead ends: 1493 [2022-11-03 04:13:54,521 INFO L226 Difference]: Without dead ends: 1387 [2022-11-03 04:13:54,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 503 SyntacticMatches, 12 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12533 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=5878, Invalid=27428, Unknown=0, NotChecked=0, Total=33306 [2022-11-03 04:13:54,525 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 2167 mSDsluCounter, 8516 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2167 SdHoareTripleChecker+Valid, 8980 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 788 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:13:54,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2167 Valid, 8980 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1584 Invalid, 0 Unknown, 788 Unchecked, 1.7s Time] [2022-11-03 04:13:54,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-11-03 04:13:54,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 169. [2022-11-03 04:13:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.2857142857142858) internal successors, (216), 168 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 216 transitions. [2022-11-03 04:13:54,543 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 216 transitions. Word has length 91 [2022-11-03 04:13:54,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:13:54,543 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 216 transitions. [2022-11-03 04:13:54,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 7.909090909090909) internal successors, (348), 44 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:13:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 216 transitions. [2022-11-03 04:13:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 04:13:54,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:13:54,545 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 04:13:54,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 04:13:54,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-11-03 04:13:54,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-03 04:13:55,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:13:55,159 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:13:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:13:55,160 INFO L85 PathProgramCache]: Analyzing trace with hash -276305275, now seen corresponding path program 1 times [2022-11-03 04:13:55,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:13:55,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709124470] [2022-11-03 04:13:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:13:55,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:13:55,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:13:55,162 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:13:55,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 04:13:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:13:55,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 04:13:55,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:13:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:13:56,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:00,455 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:00,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709124470] [2022-11-03 04:14:00,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709124470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:00,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [882297584] [2022-11-03 04:14:00,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:00,455 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:14:00,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:14:00,456 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:14:00,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 04:14:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:00,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 04:14:00,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:14:01,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:14:03,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [882297584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:03,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597491058] [2022-11-03 04:14:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:03,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:14:03,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:14:03,376 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:14:03,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 04:14:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:03,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 04:14:03,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:14:04,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 04:14:04,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597491058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:04,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:14:04,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 13, 14, 14] total 44 [2022-11-03 04:14:04,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046638882] [2022-11-03 04:14:04,913 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:14:04,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 04:14:04,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 04:14:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1783, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 04:14:04,915 INFO L87 Difference]: Start difference. First operand 169 states and 216 transitions. Second operand has 44 states, 44 states have (on average 7.2272727272727275) internal successors, (318), 44 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:15,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:15,363 INFO L93 Difference]: Finished difference Result 2081 states and 2826 transitions. [2022-11-03 04:14:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-03 04:14:15,364 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 7.2272727272727275) internal successors, (318), 44 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-03 04:14:15,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:15,369 INFO L225 Difference]: With dead ends: 2081 [2022-11-03 04:14:15,369 INFO L226 Difference]: Without dead ends: 1965 [2022-11-03 04:14:15,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 506 SyntacticMatches, 23 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6518 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=3179, Invalid=17413, Unknown=0, NotChecked=0, Total=20592 [2022-11-03 04:14:15,371 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 4571 mSDsluCounter, 7964 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4571 SdHoareTripleChecker+Valid, 8343 SdHoareTripleChecker+Invalid, 3654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2192 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:15,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4571 Valid, 8343 Invalid, 3654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1222 Invalid, 0 Unknown, 2192 Unchecked, 1.3s Time] [2022-11-03 04:14:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-11-03 04:14:15,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 327. [2022-11-03 04:14:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.294478527607362) internal successors, (422), 326 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 422 transitions. [2022-11-03 04:14:15,402 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 422 transitions. Word has length 91 [2022-11-03 04:14:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:15,403 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 422 transitions. [2022-11-03 04:14:15,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 7.2272727272727275) internal successors, (318), 44 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 422 transitions. [2022-11-03 04:14:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 04:14:15,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:15,404 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:15,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 04:14:15,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2022-11-03 04:14:15,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-03 04:14:16,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:14:16,018 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:16,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:16,019 INFO L85 PathProgramCache]: Analyzing trace with hash -346844791, now seen corresponding path program 1 times [2022-11-03 04:14:16,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:16,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492802085] [2022-11-03 04:14:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:16,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:16,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:16,021 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:16,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 04:14:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:16,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 04:14:16,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:16,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:17,208 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:17,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492802085] [2022-11-03 04:14:17,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492802085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:17,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [427781254] [2022-11-03 04:14:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:17,208 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:14:17,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:14:17,209 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:14:17,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 04:14:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:17,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 04:14:17,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:17,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:14:18,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [427781254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:18,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333830219] [2022-11-03 04:14:18,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:18,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:14:18,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:14:18,243 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:14:18,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 04:14:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:18,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 04:14:18,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:14:18,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 04:14:19,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333830219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:19,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:14:19,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 8, 8] total 31 [2022-11-03 04:14:19,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195678327] [2022-11-03 04:14:19,062 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:14:19,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 04:14:19,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:19,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 04:14:19,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-11-03 04:14:19,063 INFO L87 Difference]: Start difference. First operand 327 states and 422 transitions. Second operand has 31 states, 31 states have (on average 8.67741935483871) internal successors, (269), 31 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:19,853 INFO L93 Difference]: Finished difference Result 606 states and 795 transitions. [2022-11-03 04:14:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 04:14:19,854 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 8.67741935483871) internal successors, (269), 31 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-11-03 04:14:19,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:19,856 INFO L225 Difference]: With dead ends: 606 [2022-11-03 04:14:19,856 INFO L226 Difference]: Without dead ends: 370 [2022-11-03 04:14:19,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 512 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=351, Invalid=1811, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 04:14:19,857 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 174 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:19,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1358 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 172 Invalid, 0 Unknown, 249 Unchecked, 0.2s Time] [2022-11-03 04:14:19,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-03 04:14:19,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 295. [2022-11-03 04:14:19,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.2959183673469388) internal successors, (381), 294 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:19,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 381 transitions. [2022-11-03 04:14:19,880 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 381 transitions. Word has length 91 [2022-11-03 04:14:19,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:19,880 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 381 transitions. [2022-11-03 04:14:19,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.67741935483871) internal successors, (269), 31 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:19,881 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 381 transitions. [2022-11-03 04:14:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:14:19,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:19,882 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:19,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-03 04:14:20,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-11-03 04:14:20,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-03 04:14:20,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:14:20,508 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:14:20,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:14:20,509 INFO L85 PathProgramCache]: Analyzing trace with hash -509534429, now seen corresponding path program 1 times [2022-11-03 04:14:20,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:14:20,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083266676] [2022-11-03 04:14:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:20,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:14:20,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:14:20,511 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:14:20,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 04:14:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:20,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:14:20,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 84 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:14:21,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 84 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:14:21,970 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:14:21,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083266676] [2022-11-03 04:14:21,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083266676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:21,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2104550720] [2022-11-03 04:14:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:21,970 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:14:21,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:14:21,971 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:14:21,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 04:14:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:22,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:14:22,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 84 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:14:23,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 84 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:14:24,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2104550720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:24,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479118353] [2022-11-03 04:14:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:14:24,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:14:24,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:14:24,376 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:14:24,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-03 04:14:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:14:24,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:14:24,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:14:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 68 proven. 18 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:14:25,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:14:25,726 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 68 proven. 18 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:14:25,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479118353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:14:25,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:14:25,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16, 16, 6, 6] total 64 [2022-11-03 04:14:25,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783346177] [2022-11-03 04:14:25,727 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:14:25,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-03 04:14:25,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:14:25,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-03 04:14:25,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3841, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 04:14:25,729 INFO L87 Difference]: Start difference. First operand 295 states and 381 transitions. Second operand has 64 states, 64 states have (on average 6.609375) internal successors, (423), 64 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:59,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:14:59,690 INFO L93 Difference]: Finished difference Result 3046 states and 4086 transitions. [2022-11-03 04:14:59,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 245 states. [2022-11-03 04:14:59,691 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 6.609375) internal successors, (423), 64 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:14:59,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:14:59,695 INFO L225 Difference]: With dead ends: 3046 [2022-11-03 04:14:59,695 INFO L226 Difference]: Without dead ends: 2842 [2022-11-03 04:14:59,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1139 GetRequests, 740 SyntacticMatches, 94 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43706 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=14355, Invalid=79587, Unknown=0, NotChecked=0, Total=93942 [2022-11-03 04:14:59,702 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 10712 mSDsluCounter, 7839 mSDsCounter, 0 mSdLazyCounter, 2743 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10712 SdHoareTripleChecker+Valid, 8042 SdHoareTripleChecker+Invalid, 5406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 2743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1899 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:14:59,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10712 Valid, 8042 Invalid, 5406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 2743 Invalid, 0 Unknown, 1899 Unchecked, 2.7s Time] [2022-11-03 04:14:59,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2022-11-03 04:14:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 353. [2022-11-03 04:14:59,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.3011363636363635) internal successors, (458), 352 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 458 transitions. [2022-11-03 04:14:59,747 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 458 transitions. Word has length 134 [2022-11-03 04:14:59,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:14:59,747 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 458 transitions. [2022-11-03 04:14:59,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 6.609375) internal successors, (423), 64 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:14:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 458 transitions. [2022-11-03 04:14:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:14:59,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:14:59,750 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:14:59,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-03 04:14:59,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 04:15:00,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-11-03 04:15:00,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:15:00,362 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:15:00,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:15:00,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1105026397, now seen corresponding path program 1 times [2022-11-03 04:15:00,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:15:00,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239404784] [2022-11-03 04:15:00,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:00,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:15:00,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:15:00,364 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:15:00,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 04:15:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:00,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 04:15:00,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:15:01,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:15:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:15:03,387 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:15:03,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239404784] [2022-11-03 04:15:03,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239404784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:15:03,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1584941028] [2022-11-03 04:15:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:03,388 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:15:03,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:15:03,388 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:15:03,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 04:15:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:03,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 04:15:03,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:15:05,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:15:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:15:06,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1584941028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:15:06,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494125434] [2022-11-03 04:15:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:06,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:15:06,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:15:06,655 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:15:06,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-03 04:15:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:06,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:15:06,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 48 proven. 26 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 04:15:07,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:15:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 48 proven. 26 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 04:15:08,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494125434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:15:08,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:15:08,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18, 18, 7, 7] total 66 [2022-11-03 04:15:08,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374839825] [2022-11-03 04:15:08,180 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:15:08,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-03 04:15:08,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:15:08,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-03 04:15:08,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=4085, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 04:15:08,182 INFO L87 Difference]: Start difference. First operand 353 states and 458 transitions. Second operand has 66 states, 66 states have (on average 6.318181818181818) internal successors, (417), 66 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:46,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:15:46,399 INFO L93 Difference]: Finished difference Result 5509 states and 7354 transitions. [2022-11-03 04:15:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 349 states. [2022-11-03 04:15:46,399 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 6.318181818181818) internal successors, (417), 66 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:15:46,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:15:46,408 INFO L225 Difference]: With dead ends: 5509 [2022-11-03 04:15:46,409 INFO L226 Difference]: Without dead ends: 5259 [2022-11-03 04:15:46,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1209 GetRequests, 770 SyntacticMatches, 29 SemanticMatches, 410 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66632 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=20469, Invalid=148863, Unknown=0, NotChecked=0, Total=169332 [2022-11-03 04:15:46,416 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 5849 mSDsluCounter, 10343 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5849 SdHoareTripleChecker+Valid, 10767 SdHoareTripleChecker+Invalid, 7601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5007 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:15:46,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5849 Valid, 10767 Invalid, 7601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 2321 Invalid, 0 Unknown, 5007 Unchecked, 2.2s Time] [2022-11-03 04:15:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-11-03 04:15:46,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 369. [2022-11-03 04:15:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.3016304347826086) internal successors, (479), 368 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 479 transitions. [2022-11-03 04:15:46,473 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 479 transitions. Word has length 134 [2022-11-03 04:15:46,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:15:46,474 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 479 transitions. [2022-11-03 04:15:46,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 6.318181818181818) internal successors, (417), 66 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:15:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 479 transitions. [2022-11-03 04:15:46,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:15:46,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:15:46,476 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:15:46,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-03 04:15:46,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-03 04:15:46,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-11-03 04:15:47,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:15:47,100 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:15:47,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:15:47,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1221497051, now seen corresponding path program 1 times [2022-11-03 04:15:47,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:15:47,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747808516] [2022-11-03 04:15:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:47,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:15:47,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:15:47,102 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:15:47,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 04:15:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:47,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 04:15:47,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 44 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:15:49,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:15:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 44 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:15:54,193 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:15:54,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747808516] [2022-11-03 04:15:54,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747808516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:15:54,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [487612634] [2022-11-03 04:15:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:54,194 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:15:54,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:15:54,195 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:15:54,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-03 04:15:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:54,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 04:15:54,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 40 proven. 64 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:15:56,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:15:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 40 proven. 64 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:15:58,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [487612634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:15:58,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190931271] [2022-11-03 04:15:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:15:58,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:15:58,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:15:58,434 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:15:58,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-03 04:15:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:15:58,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:15:58,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:15:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 04:15:59,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 04:16:00,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190931271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:00,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:16:00,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 19, 19, 7, 7] total 70 [2022-11-03 04:16:00,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142384106] [2022-11-03 04:16:00,191 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:16:00,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-03 04:16:00,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:16:00,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-03 04:16:00,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=4640, Unknown=0, NotChecked=0, Total=4830 [2022-11-03 04:16:00,193 INFO L87 Difference]: Start difference. First operand 369 states and 479 transitions. Second operand has 70 states, 70 states have (on average 6.5285714285714285) internal successors, (457), 70 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:34,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:17:34,518 INFO L93 Difference]: Finished difference Result 6466 states and 8539 transitions. [2022-11-03 04:17:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 594 states. [2022-11-03 04:17:34,518 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.5285714285714285) internal successors, (457), 70 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:17:34,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:17:34,530 INFO L225 Difference]: With dead ends: 6466 [2022-11-03 04:17:34,530 INFO L226 Difference]: Without dead ends: 6200 [2022-11-03 04:17:34,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1538 GetRequests, 792 SyntacticMatches, 86 SemanticMatches, 660 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217268 ImplicationChecksByTransitivity, 92.5s TimeCoverageRelationStatistics Valid=46890, Invalid=390692, Unknown=0, NotChecked=0, Total=437582 [2022-11-03 04:17:34,548 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 6613 mSDsluCounter, 9925 mSDsCounter, 0 mSdLazyCounter, 3775 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6613 SdHoareTripleChecker+Valid, 10091 SdHoareTripleChecker+Invalid, 10675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 3775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6335 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:17:34,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6613 Valid, 10091 Invalid, 10675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 3775 Invalid, 0 Unknown, 6335 Unchecked, 4.0s Time] [2022-11-03 04:17:34,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6200 states. [2022-11-03 04:17:34,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6200 to 363. [2022-11-03 04:17:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.298342541436464) internal successors, (470), 362 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:34,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 470 transitions. [2022-11-03 04:17:34,613 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 470 transitions. Word has length 134 [2022-11-03 04:17:34,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:17:34,613 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 470 transitions. [2022-11-03 04:17:34,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 6.5285714285714285) internal successors, (457), 70 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:17:34,614 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 470 transitions. [2022-11-03 04:17:34,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:17:34,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:17:34,616 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:17:34,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 04:17:34,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-03 04:17:35,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2022-11-03 04:17:35,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:17:35,240 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:17:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:17:35,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1902633685, now seen corresponding path program 1 times [2022-11-03 04:17:35,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:17:35,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544719829] [2022-11-03 04:17:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:17:35,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:17:35,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:17:35,242 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:17:35,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 04:17:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:17:35,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 04:17:35,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:17:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 80 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:17:36,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:17:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 80 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:17:36,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:17:36,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544719829] [2022-11-03 04:17:36,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544719829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:17:36,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1380852719] [2022-11-03 04:17:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:17:36,867 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:17:36,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:17:36,868 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:17:36,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 04:17:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:17:37,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 04:17:37,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:17:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:17:38,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:17:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:17:40,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1380852719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:17:40,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037023041] [2022-11-03 04:17:40,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:17:40,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:17:40,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:17:40,436 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:17:40,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-03 04:17:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:17:40,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:17:40,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:17:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 04:17:41,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:17:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 04:17:41,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037023041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:17:41,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:17:41,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 19, 19, 7, 7] total 66 [2022-11-03 04:17:41,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517787802] [2022-11-03 04:17:41,900 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:17:41,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-03 04:17:41,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:17:41,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-03 04:17:41,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4093, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 04:17:41,903 INFO L87 Difference]: Start difference. First operand 363 states and 470 transitions. Second operand has 66 states, 66 states have (on average 7.454545454545454) internal successors, (492), 66 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:18:05,583 INFO L93 Difference]: Finished difference Result 3818 states and 5072 transitions. [2022-11-03 04:18:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-11-03 04:18:05,583 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 7.454545454545454) internal successors, (492), 66 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:18:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:18:05,590 INFO L225 Difference]: With dead ends: 3818 [2022-11-03 04:18:05,590 INFO L226 Difference]: Without dead ends: 3558 [2022-11-03 04:18:05,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 742 SyntacticMatches, 47 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25143 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=8688, Invalid=56082, Unknown=0, NotChecked=0, Total=64770 [2022-11-03 04:18:05,703 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 5491 mSDsluCounter, 11975 mSDsCounter, 0 mSdLazyCounter, 3403 mSolverCounterSat, 428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5491 SdHoareTripleChecker+Valid, 12338 SdHoareTripleChecker+Invalid, 6305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 428 IncrementalHoareTripleChecker+Valid, 3403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2474 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:18:05,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5491 Valid, 12338 Invalid, 6305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [428 Valid, 3403 Invalid, 0 Unknown, 2474 Unchecked, 3.1s Time] [2022-11-03 04:18:05,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2022-11-03 04:18:05,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 383. [2022-11-03 04:18:05,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.2958115183246073) internal successors, (495), 382 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:05,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 495 transitions. [2022-11-03 04:18:05,765 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 495 transitions. Word has length 134 [2022-11-03 04:18:05,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:18:05,765 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 495 transitions. [2022-11-03 04:18:05,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 7.454545454545454) internal successors, (492), 66 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 495 transitions. [2022-11-03 04:18:05,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:18:05,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:18:05,767 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:18:05,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-03 04:18:05,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 04:18:06,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-03 04:18:06,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:18:06,373 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:18:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:18:06,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1104463019, now seen corresponding path program 1 times [2022-11-03 04:18:06,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:18:06,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872734382] [2022-11-03 04:18:06,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:18:06,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:18:06,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:18:06,375 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:18:06,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 04:18:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:18:06,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 04:18:06,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:18:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 8 proven. 96 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:18:08,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:18:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 8 proven. 96 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:18:15,904 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:18:15,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872734382] [2022-11-03 04:18:15,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872734382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:18:15,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [749926020] [2022-11-03 04:18:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:18:15,904 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:18:15,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:18:15,905 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:18:15,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-03 04:18:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:18:16,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 04:18:16,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:18:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 04:18:17,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:18:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 04:18:20,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [749926020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:18:20,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528108082] [2022-11-03 04:18:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:18:20,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:18:20,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:18:20,013 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:18:20,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-03 04:18:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:18:20,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 04:18:20,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:18:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 04:18:21,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:18:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 2 proven. 74 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-03 04:18:22,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528108082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:18:22,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:18:22,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 13, 13, 14, 14] total 54 [2022-11-03 04:18:22,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240220175] [2022-11-03 04:18:22,226 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:18:22,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-03 04:18:22,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:18:22,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-03 04:18:22,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2728, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 04:18:22,228 INFO L87 Difference]: Start difference. First operand 383 states and 495 transitions. Second operand has 54 states, 54 states have (on average 6.62962962962963) internal successors, (358), 54 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:55,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:18:55,577 INFO L93 Difference]: Finished difference Result 3375 states and 4448 transitions. [2022-11-03 04:18:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2022-11-03 04:18:55,578 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 6.62962962962963) internal successors, (358), 54 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:18:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:18:55,584 INFO L225 Difference]: With dead ends: 3375 [2022-11-03 04:18:55,584 INFO L226 Difference]: Without dead ends: 3095 [2022-11-03 04:18:55,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1061 GetRequests, 768 SyntacticMatches, 9 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27391 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=8513, Invalid=72997, Unknown=0, NotChecked=0, Total=81510 [2022-11-03 04:18:55,590 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 3873 mSDsluCounter, 9045 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3873 SdHoareTripleChecker+Valid, 9320 SdHoareTripleChecker+Invalid, 7236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4673 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:18:55,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3873 Valid, 9320 Invalid, 7236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2321 Invalid, 0 Unknown, 4673 Unchecked, 2.2s Time] [2022-11-03 04:18:55,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2022-11-03 04:18:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 475. [2022-11-03 04:18:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 1.2911392405063291) internal successors, (612), 474 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 612 transitions. [2022-11-03 04:18:55,653 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 612 transitions. Word has length 134 [2022-11-03 04:18:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:18:55,653 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 612 transitions. [2022-11-03 04:18:55,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 6.62962962962963) internal successors, (358), 54 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:18:55,654 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 612 transitions. [2022-11-03 04:18:55,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:18:55,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:18:55,656 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:18:55,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-03 04:18:55,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-03 04:18:56,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-03 04:18:56,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:18:56,261 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:18:56,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:18:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1033923503, now seen corresponding path program 1 times [2022-11-03 04:18:56,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:18:56,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120792959] [2022-11-03 04:18:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:18:56,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:18:56,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:18:56,263 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:18:56,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-03 04:18:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:18:56,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:18:56,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:18:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:18:57,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:18:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:18:58,381 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:18:58,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120792959] [2022-11-03 04:18:58,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120792959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:18:58,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [760221461] [2022-11-03 04:18:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:18:58,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:18:58,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:18:58,382 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:18:58,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-03 04:18:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:18:58,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:18:58,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:18:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:18:59,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:19:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:19:00,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [760221461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:19:00,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561147846] [2022-11-03 04:19:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:19:00,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:19:00,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:19:00,066 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:19:00,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-03 04:19:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:19:00,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 04:19:00,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:19:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 04:19:00,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:19:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 04:19:00,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561147846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:19:00,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:19:00,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 6, 6] total 36 [2022-11-03 04:19:00,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18878470] [2022-11-03 04:19:00,777 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:19:00,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 04:19:00,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:19:00,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 04:19:00,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 04:19:00,778 INFO L87 Difference]: Start difference. First operand 475 states and 612 transitions. Second operand has 36 states, 36 states have (on average 7.805555555555555) internal successors, (281), 36 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:19:02,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:19:02,808 INFO L93 Difference]: Finished difference Result 1701 states and 2227 transitions. [2022-11-03 04:19:02,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 04:19:02,812 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 7.805555555555555) internal successors, (281), 36 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:19:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:19:02,815 INFO L225 Difference]: With dead ends: 1701 [2022-11-03 04:19:02,815 INFO L226 Difference]: Without dead ends: 1319 [2022-11-03 04:19:02,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 763 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=695, Invalid=4135, Unknown=0, NotChecked=0, Total=4830 [2022-11-03 04:19:02,817 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 817 mSDsluCounter, 2655 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 2796 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 745 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:19:02,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 2796 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 347 Invalid, 0 Unknown, 745 Unchecked, 0.4s Time] [2022-11-03 04:19:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2022-11-03 04:19:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 733. [2022-11-03 04:19:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 1.3087431693989071) internal successors, (958), 732 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:19:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 958 transitions. [2022-11-03 04:19:02,891 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 958 transitions. Word has length 134 [2022-11-03 04:19:02,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:19:02,892 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 958 transitions. [2022-11-03 04:19:02,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.805555555555555) internal successors, (281), 36 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:19:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 958 transitions. [2022-11-03 04:19:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:19:02,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:19:02,894 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:19:02,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-11-03 04:19:03,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-03 04:19:03,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-03 04:19:03,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:19:03,508 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:19:03,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:19:03,509 INFO L85 PathProgramCache]: Analyzing trace with hash -29181855, now seen corresponding path program 1 times [2022-11-03 04:19:03,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:19:03,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444004061] [2022-11-03 04:19:03,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:19:03,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:19:03,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:19:03,511 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:19:03,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 04:19:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:19:03,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 04:19:03,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:19:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 90 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:19:04,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:19:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 90 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:19:04,935 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:19:04,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444004061] [2022-11-03 04:19:04,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444004061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:19:04,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [235107157] [2022-11-03 04:19:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:19:04,936 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:19:04,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:19:04,936 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:19:04,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-03 04:19:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:19:05,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 04:19:05,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:19:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 90 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:19:05,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:19:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 90 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:19:06,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [235107157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:19:06,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048331159] [2022-11-03 04:19:06,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:19:06,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:19:06,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:19:06,282 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:19:06,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-03 04:19:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:19:06,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:19:06,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:19:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 44 proven. 42 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:19:06,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:19:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 44 proven. 42 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:19:07,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048331159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:19:07,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:19:07,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 7, 7] total 30 [2022-11-03 04:19:07,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249971896] [2022-11-03 04:19:07,425 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:19:07,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 04:19:07,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:19:07,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 04:19:07,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-11-03 04:19:07,427 INFO L87 Difference]: Start difference. First operand 733 states and 958 transitions. Second operand has 30 states, 30 states have (on average 11.6) internal successors, (348), 30 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:19:15,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:19:15,720 INFO L93 Difference]: Finished difference Result 9895 states and 13342 transitions. [2022-11-03 04:19:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-11-03 04:19:15,720 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 11.6) internal successors, (348), 30 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:19:15,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:19:15,738 INFO L225 Difference]: With dead ends: 9895 [2022-11-03 04:19:15,738 INFO L226 Difference]: Without dead ends: 9263 [2022-11-03 04:19:15,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 784 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7648 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=3767, Invalid=19185, Unknown=0, NotChecked=0, Total=22952 [2022-11-03 04:19:15,744 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 3712 mSDsluCounter, 5837 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3712 SdHoareTripleChecker+Valid, 6154 SdHoareTripleChecker+Invalid, 3094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1976 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:19:15,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3712 Valid, 6154 Invalid, 3094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1029 Invalid, 0 Unknown, 1976 Unchecked, 1.0s Time] [2022-11-03 04:19:15,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9263 states. [2022-11-03 04:19:16,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9263 to 1765. [2022-11-03 04:19:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 1.3140589569160999) internal successors, (2318), 1764 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:19:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 2318 transitions. [2022-11-03 04:19:16,007 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 2318 transitions. Word has length 134 [2022-11-03 04:19:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:19:16,007 INFO L495 AbstractCegarLoop]: Abstraction has 1765 states and 2318 transitions. [2022-11-03 04:19:16,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 11.6) internal successors, (348), 30 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:19:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 2318 transitions. [2022-11-03 04:19:16,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:19:16,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:19:16,010 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:19:16,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-03 04:19:16,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2022-11-03 04:19:16,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-03 04:19:16,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:19:16,616 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:19:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:19:16,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1217077551, now seen corresponding path program 1 times [2022-11-03 04:19:16,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:19:16,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870210415] [2022-11-03 04:19:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:19:16,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:19:16,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:19:16,618 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:19:16,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 04:19:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:19:16,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 04:19:16,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:19:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 90 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:19:17,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:19:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 90 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:19:17,551 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:19:17,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870210415] [2022-11-03 04:19:17,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870210415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:19:17,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1598232314] [2022-11-03 04:19:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:19:17,551 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:19:17,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:19:17,552 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:19:17,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-03 04:19:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:19:18,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 04:19:18,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:19:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 90 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:19:18,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:19:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 90 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 04:19:19,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1598232314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:19:19,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753557191] [2022-11-03 04:19:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:19:19,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:19:19,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:19:19,745 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:19:19,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-03 04:19:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:19:19,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:19:19,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:19:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 90 proven. 7 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 04:19:20,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:19:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 90 proven. 7 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 04:19:20,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753557191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:19:20,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:19:20,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12, 12, 7, 7] total 45 [2022-11-03 04:19:20,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551508168] [2022-11-03 04:19:20,844 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:19:20,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-03 04:19:20,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:19:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-03 04:19:20,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 04:19:20,846 INFO L87 Difference]: Start difference. First operand 1765 states and 2318 transitions. Second operand has 45 states, 45 states have (on average 10.644444444444444) internal successors, (479), 45 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:19:23,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:19:23,120 INFO L93 Difference]: Finished difference Result 3611 states and 4779 transitions. [2022-11-03 04:19:23,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 04:19:23,121 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 10.644444444444444) internal successors, (479), 45 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:19:23,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:19:23,124 INFO L225 Difference]: With dead ends: 3611 [2022-11-03 04:19:23,124 INFO L226 Difference]: Without dead ends: 1943 [2022-11-03 04:19:23,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 756 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=514, Invalid=3646, Unknown=0, NotChecked=0, Total=4160 [2022-11-03 04:19:23,126 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 765 mSDsluCounter, 4141 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 4332 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:19:23,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 4332 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 763 Invalid, 0 Unknown, 283 Unchecked, 0.7s Time] [2022-11-03 04:19:23,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2022-11-03 04:19:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 727. [2022-11-03 04:19:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 1.303030303030303) internal successors, (946), 726 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:19:23,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 946 transitions. [2022-11-03 04:19:23,228 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 946 transitions. Word has length 134 [2022-11-03 04:19:23,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:19:23,228 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 946 transitions. [2022-11-03 04:19:23,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 10.644444444444444) internal successors, (479), 45 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:19:23,229 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 946 transitions. [2022-11-03 04:19:23,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:19:23,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:19:23,230 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:19:23,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-03 04:19:23,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-03 04:19:23,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-11-03 04:19:23,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:19:23,835 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:19:23,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:19:23,836 INFO L85 PathProgramCache]: Analyzing trace with hash 492573153, now seen corresponding path program 2 times [2022-11-03 04:19:23,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:19:23,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491448935] [2022-11-03 04:19:23,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:19:23,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:19:23,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:19:23,839 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:19:23,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-03 04:19:24,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:19:24,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:19:24,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:19:24,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:19:24,441 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 90 proven. 34 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:19:24,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:19:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 90 proven. 34 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:19:24,762 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:19:24,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491448935] [2022-11-03 04:19:24,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491448935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:19:24,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1882818475] [2022-11-03 04:19:24,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:19:24,763 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:19:24,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:19:24,764 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:19:24,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-03 04:19:25,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:19:25,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:19:25,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 04:19:25,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:19:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:19:26,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:19:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:19:27,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1882818475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:19:27,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808345618] [2022-11-03 04:19:27,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:19:27,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:19:27,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:19:27,925 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:19:27,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-03 04:19:28,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:19:28,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:19:28,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:19:28,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:19:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 44 proven. 42 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:19:28,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:19:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 44 proven. 42 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:19:29,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808345618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:19:29,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:19:29,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14, 14, 7, 7] total 54 [2022-11-03 04:19:29,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115776244] [2022-11-03 04:19:29,289 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:19:29,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-03 04:19:29,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:19:29,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-03 04:19:29,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2712, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 04:19:29,291 INFO L87 Difference]: Start difference. First operand 727 states and 946 transitions. Second operand has 54 states, 54 states have (on average 9.592592592592593) internal successors, (518), 54 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:20:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:20:57,620 INFO L93 Difference]: Finished difference Result 19097 states and 25858 transitions. [2022-11-03 04:20:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 665 states. [2022-11-03 04:20:57,621 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 9.592592592592593) internal successors, (518), 54 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:20:57,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:20:57,639 INFO L225 Difference]: With dead ends: 19097 [2022-11-03 04:20:57,639 INFO L226 Difference]: Without dead ends: 18459 [2022-11-03 04:20:57,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1481 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 715 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223664 ImplicationChecksByTransitivity, 81.3s TimeCoverageRelationStatistics Valid=53161, Invalid=460211, Unknown=0, NotChecked=0, Total=513372 [2022-11-03 04:20:57,669 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 10254 mSDsluCounter, 11509 mSDsCounter, 0 mSdLazyCounter, 4499 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10254 SdHoareTripleChecker+Valid, 11967 SdHoareTripleChecker+Invalid, 8879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 4499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3521 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:20:57,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10254 Valid, 11967 Invalid, 8879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 4499 Invalid, 0 Unknown, 3521 Unchecked, 4.9s Time] [2022-11-03 04:20:57,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18459 states. [2022-11-03 04:20:57,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18459 to 781. [2022-11-03 04:20:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 1.2974358974358975) internal successors, (1012), 780 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:20:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1012 transitions. [2022-11-03 04:20:57,821 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1012 transitions. Word has length 134 [2022-11-03 04:20:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:20:57,821 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 1012 transitions. [2022-11-03 04:20:57,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 9.592592592592593) internal successors, (518), 54 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:20:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1012 transitions. [2022-11-03 04:20:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:20:57,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:20:57,823 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:20:57,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2022-11-03 04:20:58,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-03 04:20:58,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-11-03 04:20:58,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:20:58,429 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:20:58,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:20:58,429 INFO L85 PathProgramCache]: Analyzing trace with hash -290597529, now seen corresponding path program 1 times [2022-11-03 04:20:58,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:20:58,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699126112] [2022-11-03 04:20:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:20:58,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:20:58,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:20:58,431 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:20:58,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-03 04:20:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:20:58,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:20:58,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:20:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 104 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 04:20:58,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:20:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 04:20:59,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:20:59,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699126112] [2022-11-03 04:20:59,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699126112] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:20:59,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:20:59,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-03 04:20:59,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573925209] [2022-11-03 04:20:59,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:20:59,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:20:59,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:20:59,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:20:59,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:20:59,068 INFO L87 Difference]: Start difference. First operand 781 states and 1012 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:20:59,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:20:59,319 INFO L93 Difference]: Finished difference Result 2825 states and 3674 transitions. [2022-11-03 04:20:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:20:59,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:20:59,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:20:59,322 INFO L225 Difference]: With dead ends: 2825 [2022-11-03 04:20:59,322 INFO L226 Difference]: Without dead ends: 2078 [2022-11-03 04:20:59,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:20:59,323 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 214 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:20:59,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 249 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:20:59,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2022-11-03 04:20:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1073. [2022-11-03 04:20:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 1.287313432835821) internal successors, (1380), 1072 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:20:59,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1380 transitions. [2022-11-03 04:20:59,432 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1380 transitions. Word has length 134 [2022-11-03 04:20:59,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:20:59,432 INFO L495 AbstractCegarLoop]: Abstraction has 1073 states and 1380 transitions. [2022-11-03 04:20:59,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:20:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1380 transitions. [2022-11-03 04:20:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:20:59,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:20:59,434 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:20:59,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-03 04:20:59,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:20:59,649 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:20:59,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:20:59,649 INFO L85 PathProgramCache]: Analyzing trace with hash -213696731, now seen corresponding path program 1 times [2022-11-03 04:20:59,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:20:59,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453666879] [2022-11-03 04:20:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:20:59,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:20:59,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:20:59,651 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:20:59,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 04:20:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:20:59,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:20:59,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 100 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 04:21:00,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:21:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 04:21:00,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:21:00,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453666879] [2022-11-03 04:21:00,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453666879] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 04:21:00,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:21:00,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2022-11-03 04:21:00,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491609306] [2022-11-03 04:21:00,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:21:00,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:21:00,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:21:00,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:21:00,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:21:00,345 INFO L87 Difference]: Start difference. First operand 1073 states and 1380 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:00,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:21:00,705 INFO L93 Difference]: Finished difference Result 3205 states and 4112 transitions. [2022-11-03 04:21:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 04:21:00,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:21:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:21:00,708 INFO L225 Difference]: With dead ends: 3205 [2022-11-03 04:21:00,708 INFO L226 Difference]: Without dead ends: 2176 [2022-11-03 04:21:00,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:21:00,710 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 134 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:21:00,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 331 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:21:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2022-11-03 04:21:00,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1073. [2022-11-03 04:21:00,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 1.2705223880597014) internal successors, (1362), 1072 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1362 transitions. [2022-11-03 04:21:00,817 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1362 transitions. Word has length 134 [2022-11-03 04:21:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:21:00,817 INFO L495 AbstractCegarLoop]: Abstraction has 1073 states and 1362 transitions. [2022-11-03 04:21:00,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1362 transitions. [2022-11-03 04:21:00,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:21:00,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:21:00,819 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:21:00,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-03 04:21:01,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:21:01,034 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:21:01,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:21:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash 465575523, now seen corresponding path program 1 times [2022-11-03 04:21:01,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:21:01,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650038405] [2022-11-03 04:21:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:01,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:21:01,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:21:01,037 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:21:01,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 04:21:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:01,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:21:01,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 84 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:21:01,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:21:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 84 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:21:02,449 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:21:02,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650038405] [2022-11-03 04:21:02,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650038405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:21:02,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [39448356] [2022-11-03 04:21:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:02,450 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:21:02,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:21:02,451 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:21:02,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-03 04:21:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:02,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:21:02,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 26 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:21:03,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:21:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 26 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:21:04,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [39448356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:21:04,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281544564] [2022-11-03 04:21:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:04,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:21:04,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:21:04,512 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:21:04,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-03 04:21:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:04,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:21:04,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 62 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:21:05,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:21:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 62 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:21:05,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281544564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:21:05,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:21:05,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 7, 7, 7, 7] total 47 [2022-11-03 04:21:05,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575176802] [2022-11-03 04:21:05,997 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:21:05,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-03 04:21:05,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:21:05,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-03 04:21:05,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2043, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 04:21:05,999 INFO L87 Difference]: Start difference. First operand 1073 states and 1362 transitions. Second operand has 47 states, 47 states have (on average 9.97872340425532) internal successors, (469), 47 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:21:15,882 INFO L93 Difference]: Finished difference Result 9624 states and 12469 transitions. [2022-11-03 04:21:15,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-11-03 04:21:15,883 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 9.97872340425532) internal successors, (469), 47 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:21:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:21:15,887 INFO L225 Difference]: With dead ends: 9624 [2022-11-03 04:21:15,887 INFO L226 Difference]: Without dead ends: 8676 [2022-11-03 04:21:15,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 755 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5683 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2555, Invalid=21315, Unknown=0, NotChecked=0, Total=23870 [2022-11-03 04:21:15,889 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 1812 mSDsluCounter, 11498 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1812 SdHoareTripleChecker+Valid, 11924 SdHoareTripleChecker+Invalid, 3886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2157 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:21:15,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1812 Valid, 11924 Invalid, 3886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1679 Invalid, 0 Unknown, 2157 Unchecked, 1.5s Time] [2022-11-03 04:21:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2022-11-03 04:21:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 2083. [2022-11-03 04:21:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 1.2804995196926032) internal successors, (2666), 2082 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 2666 transitions. [2022-11-03 04:21:16,146 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 2666 transitions. Word has length 134 [2022-11-03 04:21:16,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:21:16,146 INFO L495 AbstractCegarLoop]: Abstraction has 2083 states and 2666 transitions. [2022-11-03 04:21:16,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 9.97872340425532) internal successors, (469), 47 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:16,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 2666 transitions. [2022-11-03 04:21:16,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:21:16,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:21:16,148 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:21:16,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-03 04:21:16,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-11-03 04:21:16,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2022-11-03 04:21:16,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:21:16,763 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:21:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:21:16,764 INFO L85 PathProgramCache]: Analyzing trace with hash -12829345, now seen corresponding path program 1 times [2022-11-03 04:21:16,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:21:16,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564942266] [2022-11-03 04:21:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:16,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:21:16,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:21:16,766 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:21:16,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 04:21:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:17,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 04:21:17,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 72 proven. 32 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:21:17,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:21:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 72 proven. 32 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:21:18,181 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:21:18,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564942266] [2022-11-03 04:21:18,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564942266] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:21:18,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1475762971] [2022-11-03 04:21:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:18,182 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:21:18,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:21:18,183 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:21:18,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-03 04:21:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:18,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:21:18,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 52 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:21:19,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:21:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 52 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:21:21,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1475762971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:21:21,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988433421] [2022-11-03 04:21:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:21,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:21:21,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:21:21,948 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:21:21,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-03 04:21:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:22,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:21:22,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 68 proven. 6 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 04:21:22,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:21:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 68 proven. 6 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 04:21:23,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988433421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:21:23,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:21:23,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17, 17, 6, 6] total 66 [2022-11-03 04:21:23,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454630103] [2022-11-03 04:21:23,283 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:21:23,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-03 04:21:23,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:21:23,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-03 04:21:23,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=4094, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 04:21:23,285 INFO L87 Difference]: Start difference. First operand 2083 states and 2666 transitions. Second operand has 66 states, 66 states have (on average 7.045454545454546) internal successors, (465), 66 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:36,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:21:36,135 INFO L93 Difference]: Finished difference Result 10353 states and 13400 transitions. [2022-11-03 04:21:36,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-03 04:21:36,136 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 7.045454545454546) internal successors, (465), 66 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:21:36,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:21:36,142 INFO L225 Difference]: With dead ends: 10353 [2022-11-03 04:21:36,143 INFO L226 Difference]: Without dead ends: 8395 [2022-11-03 04:21:36,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 734 SyntacticMatches, 36 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5159 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=2958, Invalid=16224, Unknown=0, NotChecked=0, Total=19182 [2022-11-03 04:21:36,146 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 4426 mSDsluCounter, 10785 mSDsCounter, 0 mSdLazyCounter, 2751 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4426 SdHoareTripleChecker+Valid, 11080 SdHoareTripleChecker+Invalid, 4157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1217 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:21:36,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4426 Valid, 11080 Invalid, 4157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2751 Invalid, 0 Unknown, 1217 Unchecked, 2.3s Time] [2022-11-03 04:21:36,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8395 states. [2022-11-03 04:21:36,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8395 to 3547. [2022-11-03 04:21:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3546 states have (on average 1.2853919909757474) internal successors, (4558), 3546 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 4558 transitions. [2022-11-03 04:21:36,489 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 4558 transitions. Word has length 134 [2022-11-03 04:21:36,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:21:36,489 INFO L495 AbstractCegarLoop]: Abstraction has 3547 states and 4558 transitions. [2022-11-03 04:21:36,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 7.045454545454546) internal successors, (465), 66 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:21:36,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 4558 transitions. [2022-11-03 04:21:36,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:21:36,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:21:36,491 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:21:36,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Forceful destruction successful, exit code 0 [2022-11-03 04:21:36,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-03 04:21:36,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-03 04:21:37,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:21:37,096 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:21:37,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:21:37,097 INFO L85 PathProgramCache]: Analyzing trace with hash 744407263, now seen corresponding path program 1 times [2022-11-03 04:21:37,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:21:37,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75139721] [2022-11-03 04:21:37,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:37,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:21:37,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:21:37,098 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:21:37,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 04:21:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:37,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 04:21:37,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 64 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:21:38,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:21:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 64 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:21:40,570 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:21:40,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75139721] [2022-11-03 04:21:40,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75139721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:21:40,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [514581629] [2022-11-03 04:21:40,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:40,571 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:21:40,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:21:40,573 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:21:40,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-03 04:21:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:41,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 04:21:41,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 64 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:21:42,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:21:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 64 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:21:43,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [514581629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:21:43,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136863931] [2022-11-03 04:21:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:21:43,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:21:43,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:21:43,941 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:21:43,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-03 04:21:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:21:44,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:21:44,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:21:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 44 proven. 14 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 04:21:44,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:21:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 44 proven. 14 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 04:21:45,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136863931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:21:45,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:21:45,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18, 18, 7, 7] total 66 [2022-11-03 04:21:45,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866741125] [2022-11-03 04:21:45,644 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:21:45,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-03 04:21:45,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:21:45,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-03 04:21:45,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4089, Unknown=0, NotChecked=0, Total=4290 [2022-11-03 04:21:45,646 INFO L87 Difference]: Start difference. First operand 3547 states and 4558 transitions. Second operand has 66 states, 66 states have (on average 6.696969696969697) internal successors, (442), 66 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:22:41,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:22:41,391 INFO L93 Difference]: Finished difference Result 40532 states and 53103 transitions. [2022-11-03 04:22:41,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 327 states. [2022-11-03 04:22:41,391 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 6.696969696969697) internal successors, (442), 66 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:22:41,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:22:41,414 INFO L225 Difference]: With dead ends: 40532 [2022-11-03 04:22:41,414 INFO L226 Difference]: Without dead ends: 37100 [2022-11-03 04:22:41,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1123 GetRequests, 734 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56759 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=22550, Invalid=129940, Unknown=0, NotChecked=0, Total=152490 [2022-11-03 04:22:41,423 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 5323 mSDsluCounter, 11246 mSDsCounter, 0 mSdLazyCounter, 4678 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5323 SdHoareTripleChecker+Valid, 11521 SdHoareTripleChecker+Invalid, 4988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 4678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:22:41,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5323 Valid, 11521 Invalid, 4988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 4678 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-03 04:22:41,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37100 states. [2022-11-03 04:22:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37100 to 3557. [2022-11-03 04:22:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3557 states, 3556 states have (on average 1.2769966254218224) internal successors, (4541), 3556 states have internal predecessors, (4541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:22:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3557 states to 3557 states and 4541 transitions. [2022-11-03 04:22:41,886 INFO L78 Accepts]: Start accepts. Automaton has 3557 states and 4541 transitions. Word has length 134 [2022-11-03 04:22:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:22:41,887 INFO L495 AbstractCegarLoop]: Abstraction has 3557 states and 4541 transitions. [2022-11-03 04:22:41,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 6.696969696969697) internal successors, (442), 66 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:22:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3557 states and 4541 transitions. [2022-11-03 04:22:41,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:22:41,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:22:41,888 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:22:41,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-03 04:22:42,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Ended with exit code 0 [2022-11-03 04:22:42,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-11-03 04:22:42,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:22:42,504 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:22:42,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:22:42,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1133417629, now seen corresponding path program 1 times [2022-11-03 04:22:42,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:22:42,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264806838] [2022-11-03 04:22:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:22:42,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:22:42,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:22:42,506 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:22:42,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 04:22:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:22:42,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:22:42,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:22:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 48 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:22:43,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:22:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 48 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:22:44,018 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:22:44,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264806838] [2022-11-03 04:22:44,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264806838] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:22:44,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [455238985] [2022-11-03 04:22:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:22:44,018 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:22:44,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:22:44,019 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:22:44,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-03 04:22:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:22:44,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 04:22:44,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:22:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:22:46,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:22:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:22:47,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [455238985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:22:47,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441997353] [2022-11-03 04:22:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:22:47,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:22:47,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:22:47,764 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:22:47,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-03 04:22:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:22:47,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:22:47,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:22:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 04:22:48,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:22:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-03 04:22:49,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441997353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:22:49,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:22:49,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 19, 19, 8, 8] total 72 [2022-11-03 04:22:49,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923605703] [2022-11-03 04:22:49,537 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:22:49,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-03 04:22:49,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:22:49,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-03 04:22:49,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=4926, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 04:22:49,539 INFO L87 Difference]: Start difference. First operand 3557 states and 4541 transitions. Second operand has 72 states, 72 states have (on average 7.291666666666667) internal successors, (525), 72 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:23:30,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:23:30,165 INFO L93 Difference]: Finished difference Result 44352 states and 57762 transitions. [2022-11-03 04:23:30,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2022-11-03 04:23:30,166 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 7.291666666666667) internal successors, (525), 72 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:23:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:23:30,186 INFO L225 Difference]: With dead ends: 44352 [2022-11-03 04:23:30,186 INFO L226 Difference]: Without dead ends: 40970 [2022-11-03 04:23:30,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1158 GetRequests, 814 SyntacticMatches, 13 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36222 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=12899, Invalid=97657, Unknown=0, NotChecked=0, Total=110556 [2022-11-03 04:23:30,194 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 6018 mSDsluCounter, 19102 mSDsCounter, 0 mSdLazyCounter, 7675 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6018 SdHoareTripleChecker+Valid, 19621 SdHoareTripleChecker+Invalid, 9877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 7675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1818 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:23:30,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6018 Valid, 19621 Invalid, 9877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 7675 Invalid, 0 Unknown, 1818 Unchecked, 5.9s Time] [2022-11-03 04:23:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40970 states. [2022-11-03 04:23:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40970 to 3681. [2022-11-03 04:23:30,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3681 states, 3680 states have (on average 1.277445652173913) internal successors, (4701), 3680 states have internal predecessors, (4701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:23:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3681 states to 3681 states and 4701 transitions. [2022-11-03 04:23:30,660 INFO L78 Accepts]: Start accepts. Automaton has 3681 states and 4701 transitions. Word has length 134 [2022-11-03 04:23:30,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:23:30,661 INFO L495 AbstractCegarLoop]: Abstraction has 3681 states and 4701 transitions. [2022-11-03 04:23:30,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 7.291666666666667) internal successors, (525), 72 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:23:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3681 states and 4701 transitions. [2022-11-03 04:23:30,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:23:30,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:23:30,662 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:23:30,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-03 04:23:30,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Ended with exit code 0 [2022-11-03 04:23:31,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-11-03 04:23:31,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:23:31,277 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:23:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:23:31,278 INFO L85 PathProgramCache]: Analyzing trace with hash -692391709, now seen corresponding path program 1 times [2022-11-03 04:23:31,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:23:31,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276770718] [2022-11-03 04:23:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:23:31,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:23:31,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:23:31,279 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:23:31,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-03 04:23:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:23:31,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 04:23:31,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:23:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 72 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:23:32,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:23:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 72 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:23:32,810 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:23:32,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276770718] [2022-11-03 04:23:32,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276770718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:23:32,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [524854244] [2022-11-03 04:23:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:23:32,810 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:23:32,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:23:32,811 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:23:32,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-03 04:23:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:23:33,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 04:23:33,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:23:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 20 proven. 88 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 04:23:33,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:23:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 20 proven. 84 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:23:34,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [524854244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:23:34,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500065634] [2022-11-03 04:23:34,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:23:34,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:23:34,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:23:34,182 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:23:34,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-03 04:23:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:23:34,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 04:23:34,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:23:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 72 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:23:34,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:23:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 72 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:23:35,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500065634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:23:35,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:23:35,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 19, 17, 17, 17] total 34 [2022-11-03 04:23:35,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380594662] [2022-11-03 04:23:35,120 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:23:35,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 04:23:35,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:23:35,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 04:23:35,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 04:23:35,122 INFO L87 Difference]: Start difference. First operand 3681 states and 4701 transitions. Second operand has 34 states, 34 states have (on average 6.235294117647059) internal successors, (212), 34 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:23:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:23:43,650 INFO L93 Difference]: Finished difference Result 35004 states and 45055 transitions. [2022-11-03 04:23:43,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-03 04:23:43,651 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.235294117647059) internal successors, (212), 34 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:23:43,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:23:43,667 INFO L225 Difference]: With dead ends: 35004 [2022-11-03 04:23:43,667 INFO L226 Difference]: Without dead ends: 32742 [2022-11-03 04:23:43,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7768 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4168, Invalid=19702, Unknown=0, NotChecked=0, Total=23870 [2022-11-03 04:23:43,673 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 2080 mSDsluCounter, 5653 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2080 SdHoareTripleChecker+Valid, 5919 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:23:43,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2080 Valid, 5919 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 04:23:43,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32742 states. [2022-11-03 04:23:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32742 to 3793. [2022-11-03 04:23:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 1.2721518987341771) internal successors, (4824), 3792 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:23:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 4824 transitions. [2022-11-03 04:23:44,077 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 4824 transitions. Word has length 134 [2022-11-03 04:23:44,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:23:44,077 INFO L495 AbstractCegarLoop]: Abstraction has 3793 states and 4824 transitions. [2022-11-03 04:23:44,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.235294117647059) internal successors, (212), 34 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:23:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 4824 transitions. [2022-11-03 04:23:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:23:44,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:23:44,078 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:23:44,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (83)] Forceful destruction successful, exit code 0 [2022-11-03 04:23:44,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-11-03 04:23:44,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-03 04:23:44,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:23:44,679 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:23:44,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:23:44,680 INFO L85 PathProgramCache]: Analyzing trace with hash 195332329, now seen corresponding path program 1 times [2022-11-03 04:23:44,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:23:44,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723038288] [2022-11-03 04:23:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:23:44,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:23:44,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:23:44,681 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:23:44,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-03 04:23:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:23:44,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 04:23:44,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:23:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:23:45,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:23:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:23:46,996 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:23:46,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723038288] [2022-11-03 04:23:46,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723038288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:23:46,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1706116648] [2022-11-03 04:23:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:23:46,997 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:23:46,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:23:47,000 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:23:47,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-03 04:23:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:23:47,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 04:23:47,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:23:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:23:48,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:23:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:23:48,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1706116648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:23:48,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143335424] [2022-11-03 04:23:48,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:23:48,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:23:48,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:23:48,952 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:23:48,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-03 04:23:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:23:49,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 04:23:49,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:23:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 04:23:49,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:23:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 04:23:50,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143335424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:23:50,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:23:50,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 15, 15] total 28 [2022-11-03 04:23:50,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437818360] [2022-11-03 04:23:50,871 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:23:50,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 04:23:50,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:23:50,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 04:23:50,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2022-11-03 04:23:50,872 INFO L87 Difference]: Start difference. First operand 3793 states and 4824 transitions. Second operand has 28 states, 28 states have (on average 7.0) internal successors, (196), 28 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:23:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:23:52,459 INFO L93 Difference]: Finished difference Result 6885 states and 8817 transitions. [2022-11-03 04:23:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 04:23:52,460 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 7.0) internal successors, (196), 28 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:23:52,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:23:52,463 INFO L225 Difference]: With dead ends: 6885 [2022-11-03 04:23:52,463 INFO L226 Difference]: Without dead ends: 6883 [2022-11-03 04:23:52,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 813 GetRequests, 770 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 04:23:52,464 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 667 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:23:52,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1879 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 168 Invalid, 0 Unknown, 352 Unchecked, 0.2s Time] [2022-11-03 04:23:52,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6883 states. [2022-11-03 04:23:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6883 to 4161. [2022-11-03 04:23:52,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4161 states, 4160 states have (on average 1.2745192307692308) internal successors, (5302), 4160 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:23:52,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4161 states to 4161 states and 5302 transitions. [2022-11-03 04:23:52,818 INFO L78 Accepts]: Start accepts. Automaton has 4161 states and 5302 transitions. Word has length 134 [2022-11-03 04:23:52,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:23:52,819 INFO L495 AbstractCegarLoop]: Abstraction has 4161 states and 5302 transitions. [2022-11-03 04:23:52,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.0) internal successors, (196), 28 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:23:52,819 INFO L276 IsEmpty]: Start isEmpty. Operand 4161 states and 5302 transitions. [2022-11-03 04:23:52,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:23:52,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:23:52,820 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:23:52,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-11-03 04:23:53,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-03 04:23:53,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (86)] Ended with exit code 0 [2022-11-03 04:23:53,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:23:53,432 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:23:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:23:53,433 INFO L85 PathProgramCache]: Analyzing trace with hash 896932203, now seen corresponding path program 1 times [2022-11-03 04:23:53,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:23:53,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865508512] [2022-11-03 04:23:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:23:53,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:23:53,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:23:53,434 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:23:53,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 04:23:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:23:53,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 04:23:53,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:23:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:23:54,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:23:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 72 proven. 32 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:23:55,722 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:23:55,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865508512] [2022-11-03 04:23:55,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865508512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:23:55,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [638148308] [2022-11-03 04:23:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:23:55,722 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:23:55,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:23:55,723 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:23:55,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-03 04:23:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:23:56,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 04:23:56,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:23:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 26 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:23:56,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:23:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 26 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 04:23:57,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [638148308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:23:57,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249665449] [2022-11-03 04:23:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:23:57,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:23:57,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:23:57,584 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:23:57,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-03 04:23:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:23:57,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 04:23:57,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:23:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 41 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 04:23:58,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:23:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 75 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 04:23:59,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249665449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:23:59,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:23:59,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 7, 7, 10, 10] total 44 [2022-11-03 04:23:59,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791802357] [2022-11-03 04:23:59,356 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:23:59,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-03 04:23:59,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:23:59,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-03 04:23:59,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1662, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 04:23:59,357 INFO L87 Difference]: Start difference. First operand 4161 states and 5302 transitions. Second operand has 44 states, 44 states have (on average 7.431818181818182) internal successors, (327), 44 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:24:05,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:24:05,476 INFO L93 Difference]: Finished difference Result 22680 states and 29113 transitions. [2022-11-03 04:24:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-03 04:24:05,476 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 7.431818181818182) internal successors, (327), 44 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:24:05,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:24:05,490 INFO L225 Difference]: With dead ends: 22680 [2022-11-03 04:24:05,491 INFO L226 Difference]: Without dead ends: 18642 [2022-11-03 04:24:05,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 765 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1325, Invalid=7795, Unknown=0, NotChecked=0, Total=9120 [2022-11-03 04:24:05,497 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 1124 mSDsluCounter, 4945 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 5183 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1161 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:24:05,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1124 Valid, 5183 Invalid, 2147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 966 Invalid, 0 Unknown, 1161 Unchecked, 0.9s Time] [2022-11-03 04:24:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18642 states. [2022-11-03 04:24:06,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18642 to 7717. [2022-11-03 04:24:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7717 states, 7716 states have (on average 1.2752721617418352) internal successors, (9840), 7716 states have internal predecessors, (9840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:24:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7717 states to 7717 states and 9840 transitions. [2022-11-03 04:24:06,231 INFO L78 Accepts]: Start accepts. Automaton has 7717 states and 9840 transitions. Word has length 134 [2022-11-03 04:24:06,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:24:06,232 INFO L495 AbstractCegarLoop]: Abstraction has 7717 states and 9840 transitions. [2022-11-03 04:24:06,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 7.431818181818182) internal successors, (327), 44 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:24:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 7717 states and 9840 transitions. [2022-11-03 04:24:06,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:24:06,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:24:06,232 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:24:06,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Forceful destruction successful, exit code 0 [2022-11-03 04:24:06,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-03 04:24:06,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-11-03 04:24:06,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:24:06,833 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:24:06,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:24:06,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1650034837, now seen corresponding path program 1 times [2022-11-03 04:24:06,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:24:06,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683765798] [2022-11-03 04:24:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:24:06,834 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:24:06,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:24:06,835 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:24:06,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-03 04:24:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:24:07,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:24:07,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:24:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:24:07,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:24:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:24:08,836 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:24:08,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683765798] [2022-11-03 04:24:08,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683765798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:24:08,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2038734993] [2022-11-03 04:24:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:24:08,836 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:24:08,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:24:08,837 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:24:08,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-03 04:24:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:24:09,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:24:09,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:24:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:24:09,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:24:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:24:10,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2038734993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:24:10,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675588701] [2022-11-03 04:24:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:24:10,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:24:10,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:24:10,354 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:24:10,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-03 04:24:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:24:10,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 04:24:10,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:24:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:24:11,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:24:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 04:24:11,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675588701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:24:11,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:24:11,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 17, 17] total 32 [2022-11-03 04:24:11,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055791591] [2022-11-03 04:24:11,687 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:24:11,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 04:24:11,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:24:11,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 04:24:11,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-11-03 04:24:11,688 INFO L87 Difference]: Start difference. First operand 7717 states and 9840 transitions. Second operand has 32 states, 32 states have (on average 5.53125) internal successors, (177), 32 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:24:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:24:13,601 INFO L93 Difference]: Finished difference Result 15022 states and 19185 transitions. [2022-11-03 04:24:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 04:24:13,601 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.53125) internal successors, (177), 32 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-11-03 04:24:13,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:24:13,606 INFO L225 Difference]: With dead ends: 15022 [2022-11-03 04:24:13,606 INFO L226 Difference]: Without dead ends: 9966 [2022-11-03 04:24:13,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 766 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=499, Invalid=2363, Unknown=0, NotChecked=0, Total=2862 [2022-11-03 04:24:13,610 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 370 mSDsluCounter, 3765 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 3978 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 544 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:24:13,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 3978 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 315 Invalid, 0 Unknown, 544 Unchecked, 0.3s Time] [2022-11-03 04:24:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9966 states. [2022-11-03 04:24:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9966 to 6499. [2022-11-03 04:24:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6499 states, 6498 states have (on average 1.2765466297322252) internal successors, (8295), 6498 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:24:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6499 states to 6499 states and 8295 transitions. [2022-11-03 04:24:14,161 INFO L78 Accepts]: Start accepts. Automaton has 6499 states and 8295 transitions. Word has length 134 [2022-11-03 04:24:14,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:24:14,161 INFO L495 AbstractCegarLoop]: Abstraction has 6499 states and 8295 transitions. [2022-11-03 04:24:14,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.53125) internal successors, (177), 32 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:24:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 6499 states and 8295 transitions. [2022-11-03 04:24:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-03 04:24:14,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:24:14,165 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:24:14,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (92)] Forceful destruction successful, exit code 0 [2022-11-03 04:24:14,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-11-03 04:24:14,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-03 04:24:14,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:24:14,770 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:24:14,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:24:14,770 INFO L85 PathProgramCache]: Analyzing trace with hash -342376767, now seen corresponding path program 1 times [2022-11-03 04:24:14,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:24:14,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38904001] [2022-11-03 04:24:14,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:24:14,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:24:14,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:24:14,772 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:24:14,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-03 04:24:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:24:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:24:15,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:24:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 125 proven. 44 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-03 04:24:15,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:24:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 125 proven. 44 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-03 04:24:16,504 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:24:16,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38904001] [2022-11-03 04:24:16,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38904001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:24:16,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [782475682] [2022-11-03 04:24:16,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:24:16,504 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:24:16,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:24:16,505 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:24:16,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-11-03 04:24:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:24:17,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 04:24:17,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:24:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 95 proven. 74 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-03 04:24:18,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:24:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 95 proven. 74 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-03 04:24:20,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [782475682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:24:20,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701015005] [2022-11-03 04:24:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:24:20,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:24:20,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:24:20,763 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:24:20,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a48a03-951f-4e20-8dc5-fc42fe70b69a/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-11-03 04:24:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:24:21,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 04:24:21,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:24:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 29 proven. 99 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-03 04:24:21,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:24:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 29 proven. 99 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-03 04:24:22,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701015005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:24:22,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:24:22,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 19, 19, 7, 7] total 71 [2022-11-03 04:24:22,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895058086] [2022-11-03 04:24:22,645 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:24:22,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-03 04:24:22,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:24:22,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-03 04:24:22,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4795, Unknown=0, NotChecked=0, Total=4970 [2022-11-03 04:24:22,646 INFO L87 Difference]: Start difference. First operand 6499 states and 8295 transitions. Second operand has 71 states, 71 states have (on average 7.112676056338028) internal successors, (505), 71 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)