./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_sym_ex.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_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/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_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_sym_ex.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/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_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/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 347032abdcb13191d63b716e25ce8d55c6ba9687c92a24e2ca0f1a12d6742496 --- 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 03:43:13,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:43:13,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:43:13,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:43:13,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:43:13,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:43:13,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:43:13,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:43:13,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:43:13,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:43:13,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:43:13,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:43:13,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:43:13,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:43:13,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:43:13,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:43:13,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:43:13,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:43:13,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:43:13,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:43:13,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:43:13,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:43:13,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:43:13,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:43:13,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:43:13,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:43:13,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:43:13,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:43:13,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:43:13,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:43:13,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:43:13,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:43:13,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:43:13,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:43:13,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:43:13,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:43:13,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:43:13,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:43:13,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:43:13,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:43:13,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:43:13,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:43:13,936 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:43:13,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:43:13,937 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:43:13,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:43:13,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:43:13,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:43:13,938 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:43:13,939 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:43:13,939 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:43:13,939 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:43:13,939 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:43:13,940 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:43:13,940 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:43:13,940 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:43:13,940 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:43:13,941 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:43:13,941 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:43:13,941 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:43:13,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:43:13,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:43:13,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:43:13,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:43:13,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:43:13,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:43:13,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:43:13,943 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:43:13,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:43:13,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:43:13,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:43:13,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:13,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:43:13,945 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:43:13,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:43:13,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:43:13,946 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:43:13,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:43:13,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:43:13,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:43:13,947 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_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 347032abdcb13191d63b716e25ce8d55c6ba9687c92a24e2ca0f1a12d6742496 [2022-11-03 03:43:14,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:43:14,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:43:14,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:43:14,303 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:43:14,304 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:43:14,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_sym_ex.c [2022-11-03 03:43:14,371 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/data/5d8824a85/6cb1c78ffbcf4c55a6469f2875811731/FLAGd8dbd42c8 [2022-11-03 03:43:14,924 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:43:14,925 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_sym_ex.c [2022-11-03 03:43:14,937 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/data/5d8824a85/6cb1c78ffbcf4c55a6469f2875811731/FLAGd8dbd42c8 [2022-11-03 03:43:15,244 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/data/5d8824a85/6cb1c78ffbcf4c55a6469f2875811731 [2022-11-03 03:43:15,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:43:15,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:43:15,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:15,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:43:15,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:43:15,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:15" (1/1) ... [2022-11-03 03:43:15,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd22e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:15, skipping insertion in model container [2022-11-03 03:43:15,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:15" (1/1) ... [2022-11-03 03:43:15,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:43:15,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:43:15,534 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_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_sym_ex.c[1107,1120] [2022-11-03 03:43:15,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:15,749 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:43:15,761 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_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_sym_ex.c[1107,1120] [2022-11-03 03:43:15,885 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:15,898 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:43:15,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:15 WrapperNode [2022-11-03 03:43:15,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:15,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:15,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:43:15,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:43:15,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:15" (1/1) ... [2022-11-03 03:43:15,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:15" (1/1) ... [2022-11-03 03:43:16,005 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 590 [2022-11-03 03:43:16,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:16,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:43:16,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:43:16,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:43:16,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:15" (1/1) ... [2022-11-03 03:43:16,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:15" (1/1) ... [2022-11-03 03:43:16,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:15" (1/1) ... [2022-11-03 03:43:16,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:15" (1/1) ... [2022-11-03 03:43:16,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:15" (1/1) ... [2022-11-03 03:43:16,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:15" (1/1) ... [2022-11-03 03:43:16,060 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:15" (1/1) ... [2022-11-03 03:43:16,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:15" (1/1) ... [2022-11-03 03:43:16,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:43:16,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:43:16,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:43:16,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:43:16,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:15" (1/1) ... [2022-11-03 03:43:16,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:16,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:43:16,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:43:16,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:43:16,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:43:16,461 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:43:16,464 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:43:22,347 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:43:23,571 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:43:23,572 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:43:23,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:23 BoogieIcfgContainer [2022-11-03 03:43:23,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:43:23,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:43:23,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:43:23,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:43:23,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:43:15" (1/3) ... [2022-11-03 03:43:23,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a401809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:23, skipping insertion in model container [2022-11-03 03:43:23,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:15" (2/3) ... [2022-11-03 03:43:23,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a401809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:23, skipping insertion in model container [2022-11-03 03:43:23,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:23" (3/3) ... [2022-11-03 03:43:23,584 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.sw_sym_ex.c [2022-11-03 03:43:23,605 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:43:23,606 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:43:23,665 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:43:23,673 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;@2c8abc39, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:43:23,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:43:23,677 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 03:43:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:43:23,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:23,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:43:23,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:23,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash 4746797, now seen corresponding path program 1 times [2022-11-03 03:43:23,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:23,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440588110] [2022-11-03 03:43:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:23,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:43:23,932 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:43:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:43:24,089 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:43:24,092 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:43:24,093 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:43:24,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:43:24,101 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:43:24,105 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:43:24,123 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:43:24,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:43:24 BoogieIcfgContainer [2022-11-03 03:43:24,131 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:43:24,132 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:43:24,132 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:43:24,132 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:43:24,133 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:23" (3/4) ... [2022-11-03 03:43:24,136 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:43:24,137 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:43:24,138 INFO L158 Benchmark]: Toolchain (without parser) took 8889.23ms. Allocated memory was 113.2MB in the beginning and 312.5MB in the end (delta: 199.2MB). Free memory was 71.1MB in the beginning and 179.5MB in the end (delta: -108.4MB). Peak memory consumption was 89.9MB. Max. memory is 16.1GB. [2022-11-03 03:43:24,139 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 113.2MB. Free memory is still 88.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:43:24,139 INFO L158 Benchmark]: CACSL2BoogieTranslator took 645.36ms. Allocated memory is still 113.2MB. Free memory was 70.9MB in the beginning and 74.1MB in the end (delta: -3.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 03:43:24,140 INFO L158 Benchmark]: Boogie Procedure Inliner took 105.43ms. Allocated memory is still 113.2MB. Free memory was 74.1MB in the beginning and 63.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 03:43:24,141 INFO L158 Benchmark]: Boogie Preprocessor took 70.42ms. Allocated memory is still 113.2MB. Free memory was 63.6MB in the beginning and 58.5MB in the end (delta: 5.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 03:43:24,142 INFO L158 Benchmark]: RCFGBuilder took 7498.00ms. Allocated memory was 113.2MB in the beginning and 312.5MB in the end (delta: 199.2MB). Free memory was 58.5MB in the beginning and 208.8MB in the end (delta: -150.3MB). Peak memory consumption was 169.0MB. Max. memory is 16.1GB. [2022-11-03 03:43:24,142 INFO L158 Benchmark]: TraceAbstraction took 554.43ms. Allocated memory is still 312.5MB. Free memory was 207.8MB in the beginning and 180.5MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2022-11-03 03:43:24,143 INFO L158 Benchmark]: Witness Printer took 4.81ms. Allocated memory is still 312.5MB. Free memory is still 179.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:43:24,146 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 113.2MB. Free memory is still 88.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 645.36ms. Allocated memory is still 113.2MB. Free memory was 70.9MB in the beginning and 74.1MB in the end (delta: -3.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 105.43ms. Allocated memory is still 113.2MB. Free memory was 74.1MB in the beginning and 63.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 70.42ms. Allocated memory is still 113.2MB. Free memory was 63.6MB in the beginning and 58.5MB in the end (delta: 5.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 7498.00ms. Allocated memory was 113.2MB in the beginning and 312.5MB in the end (delta: 199.2MB). Free memory was 58.5MB in the beginning and 208.8MB in the end (delta: -150.3MB). Peak memory consumption was 169.0MB. Max. memory is 16.1GB. * TraceAbstraction took 554.43ms. Allocated memory is still 312.5MB. Free memory was 207.8MB in the beginning and 180.5MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Witness Printer took 4.81ms. Allocated memory is still 312.5MB. Free memory is still 179.5MB. 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 92, overapproximation of bitwiseAnd at line 82. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 8); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (8 - 1); [L28] const SORT_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 1); [L29] const SORT_5 msb_SORT_5 = (SORT_5)1 << (1 - 1); [L31] const SORT_5 var_7 = 0; [L32] const SORT_5 var_13 = 1; [L33] const SORT_1 var_33 = 0; [L34] const SORT_1 var_42 = 4; [L35] const SORT_1 var_54 = 5; [L36] const SORT_1 var_193 = 3; [L37] const SORT_1 var_199 = 2; [L39] SORT_1 input_2; [L40] SORT_1 input_3; [L41] SORT_1 input_4; [L42] SORT_5 input_6; [L43] SORT_1 input_38; [L45] SORT_5 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L46] SORT_5 state_17 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L47] SORT_5 state_19 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L48] SORT_5 state_21 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L49] SORT_5 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L50] SORT_5 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L51] SORT_5 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L52] SORT_5 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L53] SORT_5 state_31 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L54] SORT_1 state_34 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L55] SORT_1 state_36 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L57] SORT_5 init_9_arg_1 = var_7; [L58] state_8 = init_9_arg_1 [L59] SORT_5 init_18_arg_1 = var_13; [L60] state_17 = init_18_arg_1 [L61] SORT_5 init_20_arg_1 = var_7; [L62] state_19 = init_20_arg_1 [L63] SORT_5 init_22_arg_1 = var_7; [L64] state_21 = init_22_arg_1 [L65] SORT_5 init_24_arg_1 = var_7; [L66] state_23 = init_24_arg_1 [L67] SORT_5 init_26_arg_1 = var_7; [L68] state_25 = init_26_arg_1 [L69] SORT_5 init_28_arg_1 = var_7; [L70] state_27 = init_28_arg_1 [L71] SORT_5 init_30_arg_1 = var_7; [L72] state_29 = init_30_arg_1 [L73] SORT_5 init_32_arg_1 = var_13; [L74] state_31 = init_32_arg_1 [L75] SORT_1 init_35_arg_1 = var_33; [L76] state_34 = init_35_arg_1 [L77] SORT_1 init_37_arg_1 = var_33; [L78] state_36 = init_37_arg_1 VAL [init_18_arg_1=1, init_20_arg_1=0, init_22_arg_1=0, init_24_arg_1=0, init_26_arg_1=0, init_28_arg_1=0, init_30_arg_1=0, init_32_arg_1=1, init_35_arg_1=0, init_37_arg_1=0, init_9_arg_1=0, mask_SORT_1=255, mask_SORT_5=1, msb_SORT_1=128, msb_SORT_5=1, state_17=1, state_19=0, state_21=0, state_23=0, state_25=0, state_27=0, state_29=0, state_31=1, state_34=0, state_36=0, state_8=0, var_13=1, var_193=3, var_199=2, var_33=0, var_42=4, var_54=5, var_7=0] [L81] input_2 = __VERIFIER_nondet_uchar() [L82] input_2 = input_2 & mask_SORT_1 [L83] input_3 = __VERIFIER_nondet_uchar() [L84] input_3 = input_3 & mask_SORT_1 [L85] input_4 = __VERIFIER_nondet_uchar() [L86] input_4 = input_4 & mask_SORT_1 [L87] input_6 = __VERIFIER_nondet_uchar() [L88] input_38 = __VERIFIER_nondet_uchar() [L91] SORT_5 var_10_arg_0 = state_8; [L92] SORT_5 var_10 = ~var_10_arg_0; [L93] SORT_5 var_14_arg_0 = var_10; [L94] SORT_5 var_14 = ~var_14_arg_0; [L95] SORT_5 var_15_arg_0 = var_13; [L96] SORT_5 var_15_arg_1 = var_14; [L97] SORT_5 var_15 = var_15_arg_0 & var_15_arg_1; [L98] var_15 = var_15 & mask_SORT_5 [L99] SORT_5 bad_16_arg_0 = var_15; [L100] CALL __VERIFIER_assert(!(bad_16_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: 0.5s, 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, 0.1s 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 03:43:24,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/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_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/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_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_sym_ex.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/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_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/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 347032abdcb13191d63b716e25ce8d55c6ba9687c92a24e2ca0f1a12d6742496 --- 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 03:43:26,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:43:26,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:43:26,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:43:26,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:43:26,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:43:26,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:43:26,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:43:26,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:43:26,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:43:26,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:43:26,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:43:26,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:43:26,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:43:26,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:43:26,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:43:26,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:43:26,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:43:26,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:43:26,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:43:26,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:43:26,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:43:26,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:43:26,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:43:26,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:43:26,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:43:26,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:43:26,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:43:26,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:43:26,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:43:26,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:43:26,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:43:26,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:43:26,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:43:26,809 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:43:26,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:43:26,810 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:43:26,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:43:26,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:43:26,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:43:26,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:43:26,815 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:43:26,856 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:43:26,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:43:26,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:43:26,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:43:26,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:43:26,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:43:26,863 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:43:26,863 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:43:26,864 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:43:26,864 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:43:26,865 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:43:26,865 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:43:26,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:43:26,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:43:26,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:43:26,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:43:26,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:43:26,868 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:43:26,868 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:43:26,868 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:43:26,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:43:26,869 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:43:26,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:43:26,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:43:26,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:43:26,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:43:26,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:26,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:43:26,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:43:26,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:43:26,871 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:43:26,871 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:43:26,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:43:26,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:43:26,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:43:26,873 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_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 347032abdcb13191d63b716e25ce8d55c6ba9687c92a24e2ca0f1a12d6742496 [2022-11-03 03:43:27,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:43:27,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:43:27,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:43:27,313 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:43:27,313 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:43:27,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_sym_ex.c [2022-11-03 03:43:27,383 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/data/dd9fccdd9/dbc84312c44d49a9848ef49030b8fe7b/FLAG268985630 [2022-11-03 03:43:27,970 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:43:27,971 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_sym_ex.c [2022-11-03 03:43:27,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/data/dd9fccdd9/dbc84312c44d49a9848ef49030b8fe7b/FLAG268985630 [2022-11-03 03:43:28,298 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/data/dd9fccdd9/dbc84312c44d49a9848ef49030b8fe7b [2022-11-03 03:43:28,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:43:28,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:43:28,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:28,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:43:28,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:43:28,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:28" (1/1) ... [2022-11-03 03:43:28,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a72775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:28, skipping insertion in model container [2022-11-03 03:43:28,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:28" (1/1) ... [2022-11-03 03:43:28,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:43:28,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:43:28,564 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_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_sym_ex.c[1107,1120] [2022-11-03 03:43:28,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:28,764 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:43:28,776 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_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.sw_sym_ex.c[1107,1120] [2022-11-03 03:43:28,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:28,890 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:43:28,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:28 WrapperNode [2022-11-03 03:43:28,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:28,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:28,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:43:28,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:43:28,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:28" (1/1) ... [2022-11-03 03:43:28,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:28" (1/1) ... [2022-11-03 03:43:28,989 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 590 [2022-11-03 03:43:28,989 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:28,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:43:28,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:43:28,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:43:29,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:28" (1/1) ... [2022-11-03 03:43:29,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:28" (1/1) ... [2022-11-03 03:43:29,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:28" (1/1) ... [2022-11-03 03:43:29,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:28" (1/1) ... [2022-11-03 03:43:29,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:28" (1/1) ... [2022-11-03 03:43:29,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:28" (1/1) ... [2022-11-03 03:43:29,031 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:28" (1/1) ... [2022-11-03 03:43:29,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:28" (1/1) ... [2022-11-03 03:43:29,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:43:29,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:43:29,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:43:29,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:43:29,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:28" (1/1) ... [2022-11-03 03:43:29,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:29,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:29,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:43:29,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:43:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:43:29,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:43:29,410 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:43:29,412 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:43:30,091 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:43:30,099 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:43:30,100 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:43:30,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:30 BoogieIcfgContainer [2022-11-03 03:43:30,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:43:30,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:43:30,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:43:30,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:43:30,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:43:28" (1/3) ... [2022-11-03 03:43:30,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be7fbdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:30, skipping insertion in model container [2022-11-03 03:43:30,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:28" (2/3) ... [2022-11-03 03:43:30,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be7fbdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:30, skipping insertion in model container [2022-11-03 03:43:30,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:30" (3/3) ... [2022-11-03 03:43:30,112 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.sw_sym_ex.c [2022-11-03 03:43:30,134 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:43:30,134 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:43:30,187 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:43:30,195 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;@4d2b946f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:43:30,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:43:30,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 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 03:43:30,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:43:30,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:30,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:43:30,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:30,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:30,214 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 03:43:30,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:30,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838020394] [2022-11-03 03:43:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:30,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:30,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:30,230 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:30,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:43:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:30,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:43:30,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:30,634 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 03:43:30,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:30,636 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:43:30,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838020394] [2022-11-03 03:43:30,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838020394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:30,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:30,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:43:30,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227604437] [2022-11-03 03:43:30,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:30,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:43:30,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:43:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:43:30,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:43:30,684 INFO L87 Difference]: Start difference. First operand has 39 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 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 03:43:30,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:30,885 INFO L93 Difference]: Finished difference Result 104 states and 156 transitions. [2022-11-03 03:43:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:43:30,888 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 03:43:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:30,898 INFO L225 Difference]: With dead ends: 104 [2022-11-03 03:43:30,899 INFO L226 Difference]: Without dead ends: 67 [2022-11-03 03:43:30,902 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 03:43:30,906 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:30,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 130 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:43:30,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-03 03:43:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 37. [2022-11-03 03:43:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 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 03:43:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2022-11-03 03:43:30,947 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 5 [2022-11-03 03:43:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:30,947 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2022-11-03 03:43:30,947 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 03:43:30,948 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2022-11-03 03:43:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:43:30,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:30,949 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] [2022-11-03 03:43:30,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:31,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:43:31,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:31,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:31,163 INFO L85 PathProgramCache]: Analyzing trace with hash 129006159, now seen corresponding path program 1 times [2022-11-03 03:43:31,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:31,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353205874] [2022-11-03 03:43:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:31,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:31,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:31,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:31,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:43:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:31,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:43:31,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:31,689 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 03:43:31,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:31,690 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:43:31,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353205874] [2022-11-03 03:43:31,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353205874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:31,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:31,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:43:31,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625504669] [2022-11-03 03:43:31,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:31,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:43:31,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:43:31,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:43:31,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:43:31,694 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 03:43:31,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:31,812 INFO L93 Difference]: Finished difference Result 106 states and 149 transitions. [2022-11-03 03:43:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:43:31,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 36 [2022-11-03 03:43:31,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:31,815 INFO L225 Difference]: With dead ends: 106 [2022-11-03 03:43:31,815 INFO L226 Difference]: Without dead ends: 73 [2022-11-03 03:43:31,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 03:43:31,817 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 84 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:31,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 125 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:43:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-03 03:43:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2022-11-03 03:43:31,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.4) internal successors, (56), 40 states have internal predecessors, (56), 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 03:43:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 56 transitions. [2022-11-03 03:43:31,825 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 56 transitions. Word has length 36 [2022-11-03 03:43:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:31,825 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 56 transitions. [2022-11-03 03:43:31,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 03:43:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 56 transitions. [2022-11-03 03:43:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:43:31,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:31,829 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] [2022-11-03 03:43:31,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:32,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:43:32,043 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:32,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:32,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1257197235, now seen corresponding path program 1 times [2022-11-03 03:43:32,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:32,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943123802] [2022-11-03 03:43:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:32,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:32,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:32,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:32,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:43:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:32,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:43:32,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:32,505 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 03:43:32,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:32,506 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:43:32,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943123802] [2022-11-03 03:43:32,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943123802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:32,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:32,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:43:32,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027478828] [2022-11-03 03:43:32,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:32,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:43:32,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:43:32,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:43:32,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:43:32,518 INFO L87 Difference]: Start difference. First operand 41 states and 56 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 03:43:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:32,632 INFO L93 Difference]: Finished difference Result 131 states and 185 transitions. [2022-11-03 03:43:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:43:32,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 36 [2022-11-03 03:43:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:32,637 INFO L225 Difference]: With dead ends: 131 [2022-11-03 03:43:32,637 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 03:43:32,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 03:43:32,638 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 80 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:32,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 170 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:43:32,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 03:43:32,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2022-11-03 03:43:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 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 03:43:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-11-03 03:43:32,648 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 36 [2022-11-03 03:43:32,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:32,649 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-11-03 03:43:32,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 03:43:32,649 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-11-03 03:43:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:43:32,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:32,651 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] [2022-11-03 03:43:32,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:32,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:43:32,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:32,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:32,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1844003249, now seen corresponding path program 1 times [2022-11-03 03:43:32,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:32,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790113151] [2022-11-03 03:43:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:32,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:32,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:32,875 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:32,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:43:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:33,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:43:33,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:33,290 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 03:43:33,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:33,291 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:43:33,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790113151] [2022-11-03 03:43:33,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790113151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:33,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:33,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:43:33,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372059275] [2022-11-03 03:43:33,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:33,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:43:33,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:43:33,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:43:33,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:43:33,294 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 03:43:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:33,403 INFO L93 Difference]: Finished difference Result 131 states and 184 transitions. [2022-11-03 03:43:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:43:33,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 36 [2022-11-03 03:43:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:33,405 INFO L225 Difference]: With dead ends: 131 [2022-11-03 03:43:33,405 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 03:43:33,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 03:43:33,407 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 64 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:33,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 169 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:43:33,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 03:43:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2022-11-03 03:43:33,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.403225806451613) internal successors, (87), 62 states have internal predecessors, (87), 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 03:43:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2022-11-03 03:43:33,416 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 36 [2022-11-03 03:43:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:33,417 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2022-11-03 03:43:33,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 03:43:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2022-11-03 03:43:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:43:33,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:33,418 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] [2022-11-03 03:43:33,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:33,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:43:33,619 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:33,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:33,620 INFO L85 PathProgramCache]: Analyzing trace with hash -68995887, now seen corresponding path program 1 times [2022-11-03 03:43:33,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:33,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482732436] [2022-11-03 03:43:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:33,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:33,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:33,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:33,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:43:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:33,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:43:33,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:34,233 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 03:43:34,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:34,648 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 03:43:34,649 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:43:34,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482732436] [2022-11-03 03:43:34,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482732436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:34,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [909484698] [2022-11-03 03:43:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:34,650 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:43:34,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:43:34,654 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:43:34,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 03:43:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:35,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:43:35,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:35,318 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 03:43:35,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:35,593 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 03:43:35,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [909484698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:35,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637826253] [2022-11-03 03:43:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:35,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:35,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:35,596 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:35,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:43:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:35,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:43:35,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:36,096 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 03:43:36,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:36,354 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 03:43:36,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637826253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:36,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:43:36,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 16 [2022-11-03 03:43:36,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546735896] [2022-11-03 03:43:36,355 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:43:36,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 03:43:36,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:43:36,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 03:43:36,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:43:36,361 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 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 03:43:36,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:36,748 INFO L93 Difference]: Finished difference Result 132 states and 181 transitions. [2022-11-03 03:43:36,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:43:36,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 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 36 [2022-11-03 03:43:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:36,750 INFO L225 Difference]: With dead ends: 132 [2022-11-03 03:43:36,751 INFO L226 Difference]: Without dead ends: 130 [2022-11-03 03:43:36,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 192 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:43:36,752 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 269 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:36,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 371 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-11-03 03:43:36,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-03 03:43:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 92. [2022-11-03 03:43:36,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.3846153846153846) internal successors, (126), 91 states have internal predecessors, (126), 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 03:43:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2022-11-03 03:43:36,765 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 36 [2022-11-03 03:43:36,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:36,765 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2022-11-03 03:43:36,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 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 03:43:36,766 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2022-11-03 03:43:36,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:43:36,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:36,774 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] [2022-11-03 03:43:36,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:36,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:37,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:37,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:43:37,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:37,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:37,396 INFO L85 PathProgramCache]: Analyzing trace with hash 632603987, now seen corresponding path program 1 times [2022-11-03 03:43:37,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:37,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194456881] [2022-11-03 03:43:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:37,397 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:37,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:37,399 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:37,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:43:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:37,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:43:37,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:37,695 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 03:43:37,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:37,696 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:43:37,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194456881] [2022-11-03 03:43:37,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194456881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:37,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:37,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:43:37,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265739281] [2022-11-03 03:43:37,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:37,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:43:37,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:43:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:43:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:43:37,698 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 03:43:37,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:37,779 INFO L93 Difference]: Finished difference Result 126 states and 174 transitions. [2022-11-03 03:43:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:43:37,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 36 [2022-11-03 03:43:37,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:37,781 INFO L225 Difference]: With dead ends: 126 [2022-11-03 03:43:37,781 INFO L226 Difference]: Without dead ends: 69 [2022-11-03 03:43:37,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 03:43:37,783 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 78 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:37,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 123 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:43:37,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-03 03:43:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-11-03 03:43:37,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.373134328358209) internal successors, (92), 67 states have internal predecessors, (92), 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 03:43:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2022-11-03 03:43:37,792 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 36 [2022-11-03 03:43:37,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:37,792 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2022-11-03 03:43:37,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 03:43:37,793 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2022-11-03 03:43:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:43:37,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:37,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:37,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:38,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:43:38,010 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:38,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:38,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1469340409, now seen corresponding path program 1 times [2022-11-03 03:43:38,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:38,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042685422] [2022-11-03 03:43:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:38,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:38,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:38,013 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:38,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:43:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:38,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 03:43:38,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:39,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:39,692 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:43:39,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042685422] [2022-11-03 03:43:39,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042685422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:39,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1710416116] [2022-11-03 03:43:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:39,693 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:43:39,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:43:39,695 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:43:39,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 03:43:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:40,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:43:40,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:43:40,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:40,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1710416116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:40,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:43:40,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 11 [2022-11-03 03:43:40,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859386188] [2022-11-03 03:43:40,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:40,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:43:40,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:43:40,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:43:40,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:43:40,352 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:43:40,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:40,496 INFO L93 Difference]: Finished difference Result 161 states and 225 transitions. [2022-11-03 03:43:40,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:43:40,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 67 [2022-11-03 03:43:40,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:40,498 INFO L225 Difference]: With dead ends: 161 [2022-11-03 03:43:40,498 INFO L226 Difference]: Without dead ends: 128 [2022-11-03 03:43:40,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:43:40,499 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 205 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:40,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 143 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:43:40,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-03 03:43:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 70. [2022-11-03 03:43:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.3623188405797102) internal successors, (94), 69 states have internal predecessors, (94), 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 03:43:40,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2022-11-03 03:43:40,506 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 67 [2022-11-03 03:43:40,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:40,507 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2022-11-03 03:43:40,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:43:40,507 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2022-11-03 03:43:40,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:43:40,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:40,508 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] [2022-11-03 03:43:40,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:40,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:40,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:43:40,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:40,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1439423493, now seen corresponding path program 1 times [2022-11-03 03:43:40,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:40,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342579215] [2022-11-03 03:43:40,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:40,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:40,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:40,928 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:40,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:43:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:41,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:43:41,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:41,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:41,716 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:43:41,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342579215] [2022-11-03 03:43:41,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342579215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:41,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2120035052] [2022-11-03 03:43:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:41,718 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:43:41,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:43:41,719 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:43:41,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 03:43:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:42,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:43:42,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:42,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:42,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2120035052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:42,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344921697] [2022-11-03 03:43:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:42,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:42,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:42,835 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:42,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:43:43,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:43,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:43:43,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:43,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:43,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344921697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:43,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:43:43,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 03:43:43,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411313475] [2022-11-03 03:43:43,516 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:43:43,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:43:43,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:43:43,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:43:43,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:43:43,518 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 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 03:43:43,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:43,866 INFO L93 Difference]: Finished difference Result 202 states and 278 transitions. [2022-11-03 03:43:43,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:43:43,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 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 67 [2022-11-03 03:43:43,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:43,868 INFO L225 Difference]: With dead ends: 202 [2022-11-03 03:43:43,868 INFO L226 Difference]: Without dead ends: 167 [2022-11-03 03:43:43,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 385 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:43:43,869 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 389 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:43,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 406 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 95 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-11-03 03:43:43,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-03 03:43:43,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 119. [2022-11-03 03:43:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.3728813559322033) internal successors, (162), 118 states have internal predecessors, (162), 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 03:43:43,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 162 transitions. [2022-11-03 03:43:43,879 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 162 transitions. Word has length 67 [2022-11-03 03:43:43,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:43,879 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 162 transitions. [2022-11-03 03:43:43,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 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 03:43:43,880 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 162 transitions. [2022-11-03 03:43:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:43:43,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:43,881 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, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:43,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:44,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:44,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:44,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:44,496 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:44,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:44,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1080536441, now seen corresponding path program 1 times [2022-11-03 03:43:44,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:44,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503174324] [2022-11-03 03:43:44,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:44,497 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:44,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:44,498 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:44,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:43:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:44,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:43:44,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:45,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:46,563 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:43:46,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503174324] [2022-11-03 03:43:46,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503174324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:46,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1822655581] [2022-11-03 03:43:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:46,565 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:43:46,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:43:46,566 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:43:46,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 03:43:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:47,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:43:47,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:47,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:48,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1822655581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:48,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415492110] [2022-11-03 03:43:48,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:48,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:48,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:48,250 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:48,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 03:43:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:48,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 03:43:48,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:49,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:49,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415492110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:49,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:43:49,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 16, 16] total 30 [2022-11-03 03:43:49,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901830882] [2022-11-03 03:43:49,747 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:43:49,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 03:43:49,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:43:49,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 03:43:49,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-11-03 03:43:49,749 INFO L87 Difference]: Start difference. First operand 119 states and 162 transitions. Second operand has 30 states, 30 states have (on average 4.533333333333333) internal successors, (136), 30 states have internal predecessors, (136), 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 03:43:50,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:50,578 INFO L93 Difference]: Finished difference Result 299 states and 415 transitions. [2022-11-03 03:43:50,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 03:43:50,579 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.533333333333333) internal successors, (136), 30 states have internal predecessors, (136), 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 67 [2022-11-03 03:43:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:50,582 INFO L225 Difference]: With dead ends: 299 [2022-11-03 03:43:50,582 INFO L226 Difference]: Without dead ends: 297 [2022-11-03 03:43:50,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 360 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 03:43:50,586 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 544 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:50,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 998 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 97 Invalid, 0 Unknown, 260 Unchecked, 0.2s Time] [2022-11-03 03:43:50,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-03 03:43:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 199. [2022-11-03 03:43:50,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.378787878787879) internal successors, (273), 198 states have internal predecessors, (273), 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 03:43:50,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 273 transitions. [2022-11-03 03:43:50,613 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 273 transitions. Word has length 67 [2022-11-03 03:43:50,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:50,615 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 273 transitions. [2022-11-03 03:43:50,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.533333333333333) internal successors, (136), 30 states have internal predecessors, (136), 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 03:43:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 273 transitions. [2022-11-03 03:43:50,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:43:50,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:50,621 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:50,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:50,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:51,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:51,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:51,238 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:51,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:51,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1007266827, now seen corresponding path program 1 times [2022-11-03 03:43:51,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:51,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720972887] [2022-11-03 03:43:51,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:51,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:51,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:51,240 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:51,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:43:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:51,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 03:43:51,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:52,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:52,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:43:52,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720972887] [2022-11-03 03:43:52,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720972887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:52,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [137366399] [2022-11-03 03:43:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:52,823 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:43:52,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:43:52,824 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:43:52,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 03:43:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:53,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:43:53,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:43:53,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:53,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [137366399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:53,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:43:53,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 03:43:53,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753534183] [2022-11-03 03:43:53,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:53,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:43:53,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:43:53,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:43:53,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:43:53,481 INFO L87 Difference]: Start difference. First operand 199 states and 273 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:43:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:53,658 INFO L93 Difference]: Finished difference Result 488 states and 676 transitions. [2022-11-03 03:43:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:43:53,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 67 [2022-11-03 03:43:53,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:53,661 INFO L225 Difference]: With dead ends: 488 [2022-11-03 03:43:53,661 INFO L226 Difference]: Without dead ends: 433 [2022-11-03 03:43:53,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:43:53,662 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 121 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:53,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 205 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:43:53,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-03 03:43:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 203. [2022-11-03 03:43:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.3712871287128714) internal successors, (277), 202 states have internal predecessors, (277), 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 03:43:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 277 transitions. [2022-11-03 03:43:53,677 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 277 transitions. Word has length 67 [2022-11-03 03:43:53,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:53,678 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 277 transitions. [2022-11-03 03:43:53,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:43:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 277 transitions. [2022-11-03 03:43:53,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:43:53,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:53,684 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:53,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:53,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:54,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:43:54,100 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:54,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1364472435, now seen corresponding path program 1 times [2022-11-03 03:43:54,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:54,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000143112] [2022-11-03 03:43:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:54,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:54,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:54,102 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:54,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:43:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:54,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 03:43:54,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:55,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:55,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:43:55,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000143112] [2022-11-03 03:43:55,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000143112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:55,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [441834175] [2022-11-03 03:43:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:55,595 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:43:55,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:43:55,597 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:43:55,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 03:43:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:56,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:43:56,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:43:56,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:56,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [441834175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:56,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:43:56,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 03:43:56,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730449411] [2022-11-03 03:43:56,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:56,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:43:56,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:43:56,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:43:56,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:43:56,221 INFO L87 Difference]: Start difference. First operand 203 states and 277 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:43:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:56,384 INFO L93 Difference]: Finished difference Result 490 states and 674 transitions. [2022-11-03 03:43:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:43:56,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 67 [2022-11-03 03:43:56,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:56,386 INFO L225 Difference]: With dead ends: 490 [2022-11-03 03:43:56,386 INFO L226 Difference]: Without dead ends: 435 [2022-11-03 03:43:56,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:43:56,387 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 118 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:56,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 206 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:43:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-03 03:43:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 207. [2022-11-03 03:43:56,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3640776699029127) internal successors, (281), 206 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 03:43:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 281 transitions. [2022-11-03 03:43:56,398 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 281 transitions. Word has length 67 [2022-11-03 03:43:56,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:56,398 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 281 transitions. [2022-11-03 03:43:56,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:43:56,399 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 281 transitions. [2022-11-03 03:43:56,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:43:56,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:56,400 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:56,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:56,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:56,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:43:56,819 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:56,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:56,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1223923825, now seen corresponding path program 1 times [2022-11-03 03:43:56,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:56,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254874879] [2022-11-03 03:43:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:56,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:56,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:56,821 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:56,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:43:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:57,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 03:43:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:57,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:58,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:43:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254874879] [2022-11-03 03:43:58,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254874879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:58,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1937178839] [2022-11-03 03:43:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:58,230 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:43:58,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:43:58,235 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:43:58,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 03:43:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:58,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:43:58,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:43:58,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:43:58,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1937178839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:58,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:43:58,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 03:43:58,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681251581] [2022-11-03 03:43:58,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:58,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:43:58,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:43:58,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:43:58,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:43:58,892 INFO L87 Difference]: Start difference. First operand 207 states and 281 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:43:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:59,046 INFO L93 Difference]: Finished difference Result 393 states and 542 transitions. [2022-11-03 03:43:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:43:59,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 67 [2022-11-03 03:43:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:59,048 INFO L225 Difference]: With dead ends: 393 [2022-11-03 03:43:59,049 INFO L226 Difference]: Without dead ends: 338 [2022-11-03 03:43:59,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:43:59,050 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 115 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:59,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 207 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:43:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-03 03:43:59,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 211. [2022-11-03 03:43:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.3571428571428572) internal successors, (285), 210 states have internal predecessors, (285), 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 03:43:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 285 transitions. [2022-11-03 03:43:59,061 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 285 transitions. Word has length 67 [2022-11-03 03:43:59,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:59,061 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 285 transitions. [2022-11-03 03:43:59,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:43:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 285 transitions. [2022-11-03 03:43:59,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:43:59,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:59,063 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:59,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:59,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:43:59,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:43:59,467 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:59,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:59,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1265605137, now seen corresponding path program 1 times [2022-11-03 03:43:59,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:43:59,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089744564] [2022-11-03 03:43:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:59,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:43:59,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:43:59,470 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:43:59,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 03:43:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:59,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 03:43:59,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:00,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:00,974 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:00,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089744564] [2022-11-03 03:44:00,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089744564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:00,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1534355048] [2022-11-03 03:44:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:00,975 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:00,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:44:00,977 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:44:00,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 03:44:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:01,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:44:01,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:44:01,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:01,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1534355048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:01,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:44:01,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 03:44:01,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792681442] [2022-11-03 03:44:01,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:01,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:44:01,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:01,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:44:01,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:44:01,693 INFO L87 Difference]: Start difference. First operand 211 states and 285 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:44:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:01,890 INFO L93 Difference]: Finished difference Result 492 states and 667 transitions. [2022-11-03 03:44:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:44:01,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 67 [2022-11-03 03:44:01,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:01,892 INFO L225 Difference]: With dead ends: 492 [2022-11-03 03:44:01,892 INFO L226 Difference]: Without dead ends: 437 [2022-11-03 03:44:01,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:44:01,894 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 112 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:01,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 208 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-03 03:44:01,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 215. [2022-11-03 03:44:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.3504672897196262) internal successors, (289), 214 states have internal predecessors, (289), 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 03:44:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 289 transitions. [2022-11-03 03:44:01,907 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 289 transitions. Word has length 67 [2022-11-03 03:44:01,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:01,907 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 289 transitions. [2022-11-03 03:44:01,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:44:01,908 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 289 transitions. [2022-11-03 03:44:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:44:01,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:01,909 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:01,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:02,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-03 03:44:02,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:02,313 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:02,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:02,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1688306963, now seen corresponding path program 1 times [2022-11-03 03:44:02,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:02,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98840991] [2022-11-03 03:44:02,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:02,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:02,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:02,316 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:02,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:44:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:02,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 03:44:02,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:03,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:03,737 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:03,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98840991] [2022-11-03 03:44:03,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98840991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:03,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [602112183] [2022-11-03 03:44:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:03,742 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:03,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:44:03,743 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:44:03,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 03:44:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:04,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:44:04,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:44:04,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:04,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [602112183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:04,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:44:04,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 03:44:04,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026402777] [2022-11-03 03:44:04,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:04,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:44:04,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:04,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:44:04,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:44:04,352 INFO L87 Difference]: Start difference. First operand 215 states and 289 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:44:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:04,510 INFO L93 Difference]: Finished difference Result 396 states and 534 transitions. [2022-11-03 03:44:04,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:44:04,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 67 [2022-11-03 03:44:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:04,512 INFO L225 Difference]: With dead ends: 396 [2022-11-03 03:44:04,512 INFO L226 Difference]: Without dead ends: 341 [2022-11-03 03:44:04,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:44:04,513 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 109 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:04,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 209 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-03 03:44:04,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 219. [2022-11-03 03:44:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.3440366972477065) internal successors, (293), 218 states have internal predecessors, (293), 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 03:44:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 293 transitions. [2022-11-03 03:44:04,523 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 293 transitions. Word has length 67 [2022-11-03 03:44:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:04,524 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 293 transitions. [2022-11-03 03:44:04,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:44:04,524 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 293 transitions. [2022-11-03 03:44:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:44:04,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:04,525 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:04,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:04,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 03:44:04,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:04,929 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:04,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:04,929 INFO L85 PathProgramCache]: Analyzing trace with hash -636779, now seen corresponding path program 1 times [2022-11-03 03:44:04,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:04,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665495961] [2022-11-03 03:44:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:04,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:04,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:04,931 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:04,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:44:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:05,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 03:44:05,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:05,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:06,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:06,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665495961] [2022-11-03 03:44:06,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665495961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:06,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [753544911] [2022-11-03 03:44:06,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:06,262 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:06,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:44:06,263 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:44:06,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 03:44:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:06,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:44:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:44:06,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:06,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [753544911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:06,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:44:06,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 03:44:06,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024044772] [2022-11-03 03:44:06,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:06,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:44:06,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:06,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:44:06,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:44:06,904 INFO L87 Difference]: Start difference. First operand 219 states and 293 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:44:07,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:07,076 INFO L93 Difference]: Finished difference Result 488 states and 651 transitions. [2022-11-03 03:44:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:44:07,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 67 [2022-11-03 03:44:07,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:07,078 INFO L225 Difference]: With dead ends: 488 [2022-11-03 03:44:07,078 INFO L226 Difference]: Without dead ends: 433 [2022-11-03 03:44:07,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:44:07,080 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 106 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:07,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 210 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:07,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-03 03:44:07,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 223. [2022-11-03 03:44:07,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.337837837837838) internal successors, (297), 222 states have internal predecessors, (297), 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 03:44:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 297 transitions. [2022-11-03 03:44:07,091 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 297 transitions. Word has length 67 [2022-11-03 03:44:07,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:07,092 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 297 transitions. [2022-11-03 03:44:07,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:44:07,092 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 297 transitions. [2022-11-03 03:44:07,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:44:07,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:07,093 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, 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 03:44:07,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:07,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:07,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:07,507 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:07,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:07,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1588984681, now seen corresponding path program 1 times [2022-11-03 03:44:07,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:07,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428484816] [2022-11-03 03:44:07,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:07,508 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:07,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:07,509 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:07,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 03:44:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:07,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 03:44:07,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:08,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:08,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:08,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428484816] [2022-11-03 03:44:08,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428484816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:08,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2105842831] [2022-11-03 03:44:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:08,867 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:08,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:44:08,868 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:44:08,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 03:44:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:09,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:44:09,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:44:09,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:09,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2105842831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:09,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:44:09,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 03:44:09,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825413939] [2022-11-03 03:44:09,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:09,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:44:09,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:09,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:44:09,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:44:09,488 INFO L87 Difference]: Start difference. First operand 223 states and 297 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:44:09,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:09,661 INFO L93 Difference]: Finished difference Result 474 states and 629 transitions. [2022-11-03 03:44:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:44:09,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 67 [2022-11-03 03:44:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:09,663 INFO L225 Difference]: With dead ends: 474 [2022-11-03 03:44:09,663 INFO L226 Difference]: Without dead ends: 423 [2022-11-03 03:44:09,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:44:09,664 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 99 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:09,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 223 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:09,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-03 03:44:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 235. [2022-11-03 03:44:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.3376068376068375) internal successors, (313), 234 states have internal predecessors, (313), 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 03:44:09,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 313 transitions. [2022-11-03 03:44:09,677 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 313 transitions. Word has length 67 [2022-11-03 03:44:09,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:09,677 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 313 transitions. [2022-11-03 03:44:09,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:44:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 313 transitions. [2022-11-03 03:44:09,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:44:09,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:09,679 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, 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 03:44:09,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:09,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:10,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:10,095 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:10,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:10,095 INFO L85 PathProgramCache]: Analyzing trace with hash -887920103, now seen corresponding path program 1 times [2022-11-03 03:44:10,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:10,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936583339] [2022-11-03 03:44:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:10,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:10,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:10,097 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:10,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 03:44:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:10,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 03:44:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:11,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:11,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:11,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936583339] [2022-11-03 03:44:11,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936583339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:11,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1281763310] [2022-11-03 03:44:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:11,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:11,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:44:11,381 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:44:11,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 03:44:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:11,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:44:11,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:44:12,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:12,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1281763310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:12,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:44:12,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2022-11-03 03:44:12,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906669970] [2022-11-03 03:44:12,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:12,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:44:12,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:12,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:44:12,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:44:12,002 INFO L87 Difference]: Start difference. First operand 235 states and 313 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:44:12,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:12,175 INFO L93 Difference]: Finished difference Result 471 states and 624 transitions. [2022-11-03 03:44:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:44:12,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 67 [2022-11-03 03:44:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:12,178 INFO L225 Difference]: With dead ends: 471 [2022-11-03 03:44:12,178 INFO L226 Difference]: Without dead ends: 418 [2022-11-03 03:44:12,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-03 03:44:12,180 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 92 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:12,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 236 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:44:12,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-11-03 03:44:12,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 245. [2022-11-03 03:44:12,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.3360655737704918) internal successors, (326), 244 states have internal predecessors, (326), 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 03:44:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 326 transitions. [2022-11-03 03:44:12,192 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 326 transitions. Word has length 67 [2022-11-03 03:44:12,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:12,192 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 326 transitions. [2022-11-03 03:44:12,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 03:44:12,193 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 326 transitions. [2022-11-03 03:44:12,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:44:12,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:12,194 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, 1, 1, 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 03:44:12,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:12,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-03 03:44:12,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:12,598 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:12,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:12,599 INFO L85 PathProgramCache]: Analyzing trace with hash -886073061, now seen corresponding path program 1 times [2022-11-03 03:44:12,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:12,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891503449] [2022-11-03 03:44:12,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:12,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:12,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:12,601 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:12,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 03:44:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:12,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 03:44:12,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:13,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:13,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:13,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891503449] [2022-11-03 03:44:13,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891503449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:13,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1859772592] [2022-11-03 03:44:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:13,931 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:13,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:44:13,932 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:44:13,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 03:44:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:14,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 03:44:14,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:15,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:15,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1859772592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:15,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158549426] [2022-11-03 03:44:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:15,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:44:15,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:44:15,544 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:44:15,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-03 03:44:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:15,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:44:15,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:44:16,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:44:16,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158549426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:16,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:44:16,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 10, 10] total 26 [2022-11-03 03:44:16,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018416720] [2022-11-03 03:44:16,882 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:44:16,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 03:44:16,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:16,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 03:44:16,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:44:16,884 INFO L87 Difference]: Start difference. First operand 245 states and 326 transitions. Second operand has 26 states, 26 states have (on average 7.653846153846154) internal successors, (199), 26 states have internal predecessors, (199), 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 03:44:17,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:17,805 INFO L93 Difference]: Finished difference Result 334 states and 444 transitions. [2022-11-03 03:44:17,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:44:17,808 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.653846153846154) internal successors, (199), 26 states have internal predecessors, (199), 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 67 [2022-11-03 03:44:17,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:17,810 INFO L225 Difference]: With dead ends: 334 [2022-11-03 03:44:17,810 INFO L226 Difference]: Without dead ends: 251 [2022-11-03 03:44:17,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 370 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 03:44:17,811 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 242 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:17,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 848 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 79 Invalid, 0 Unknown, 163 Unchecked, 0.2s Time] [2022-11-03 03:44:17,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-03 03:44:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 234. [2022-11-03 03:44:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.3347639484978542) internal successors, (311), 233 states have internal predecessors, (311), 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 03:44:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 311 transitions. [2022-11-03 03:44:17,824 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 311 transitions. Word has length 67 [2022-11-03 03:44:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:17,824 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 311 transitions. [2022-11-03 03:44:17,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.653846153846154) internal successors, (199), 26 states have internal predecessors, (199), 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 03:44:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 311 transitions. [2022-11-03 03:44:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 03:44:17,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:17,826 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] [2022-11-03 03:44:17,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:18,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:18,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-11-03 03:44:18,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:18,443 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:18,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:18,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1561616699, now seen corresponding path program 1 times [2022-11-03 03:44:18,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:18,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310970016] [2022-11-03 03:44:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:18,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:18,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:18,446 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:18,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 03:44:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:18,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:44:18,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:44:18,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:18,807 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:18,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310970016] [2022-11-03 03:44:18,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310970016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:18,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:18,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:44:18,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110179327] [2022-11-03 03:44:18,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:18,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:18,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:18,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:18,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:44:18,809 INFO L87 Difference]: Start difference. First operand 234 states and 311 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 03:44:18,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:18,866 INFO L93 Difference]: Finished difference Result 293 states and 388 transitions. [2022-11-03 03:44:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:44:18,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 67 [2022-11-03 03:44:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:18,872 INFO L225 Difference]: With dead ends: 293 [2022-11-03 03:44:18,872 INFO L226 Difference]: Without dead ends: 172 [2022-11-03 03:44:18,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 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 03:44:18,874 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 64 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:18,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 133 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:44:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-03 03:44:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-11-03 03:44:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.327485380116959) internal successors, (227), 171 states have internal predecessors, (227), 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 03:44:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 227 transitions. [2022-11-03 03:44:18,883 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 227 transitions. Word has length 67 [2022-11-03 03:44:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:18,884 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 227 transitions. [2022-11-03 03:44:18,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 03:44:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 227 transitions. [2022-11-03 03:44:18,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:44:18,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:18,885 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, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:18,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:19,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:19,099 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:19,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:19,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1526691953, now seen corresponding path program 2 times [2022-11-03 03:44:19,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:19,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117200731] [2022-11-03 03:44:19,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:44:19,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:19,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:19,101 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:19,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 03:44:19,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:44:19,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:44:19,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:44:19,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:19,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:20,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:20,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117200731] [2022-11-03 03:44:20,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117200731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:20,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2116537606] [2022-11-03 03:44:20,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:44:20,144 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:20,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:44:20,145 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:44:20,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 03:44:21,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:44:21,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:44:21,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:44:21,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:21,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:21,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2116537606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:21,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738262488] [2022-11-03 03:44:21,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:44:21,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:44:21,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:44:21,451 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:44:21,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 03:44:21,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:44:21,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:44:21,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:44:21,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:22,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:22,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738262488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:22,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:44:22,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 19 [2022-11-03 03:44:22,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905890] [2022-11-03 03:44:22,202 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:44:22,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 03:44:22,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:22,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 03:44:22,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:44:22,204 INFO L87 Difference]: Start difference. First operand 172 states and 227 transitions. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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 03:44:23,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:23,721 INFO L93 Difference]: Finished difference Result 853 states and 1101 transitions. [2022-11-03 03:44:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-03 03:44:23,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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 98 [2022-11-03 03:44:23,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:23,724 INFO L225 Difference]: With dead ends: 853 [2022-11-03 03:44:23,724 INFO L226 Difference]: Without dead ends: 794 [2022-11-03 03:44:23,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=860, Invalid=2680, Unknown=0, NotChecked=0, Total=3540 [2022-11-03 03:44:23,725 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1882 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1882 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:23,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1882 Valid, 1073 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:44:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-11-03 03:44:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 343. [2022-11-03 03:44:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.327485380116959) internal successors, (454), 342 states have internal predecessors, (454), 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 03:44:23,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 454 transitions. [2022-11-03 03:44:23,746 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 454 transitions. Word has length 98 [2022-11-03 03:44:23,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:23,747 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 454 transitions. [2022-11-03 03:44:23,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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 03:44:23,747 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 454 transitions. [2022-11-03 03:44:23,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 03:44:23,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:23,749 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, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:23,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:23,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:24,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-03 03:44:24,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:44:24,357 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:24,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2113497967, now seen corresponding path program 3 times [2022-11-03 03:44:24,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:24,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559877820] [2022-11-03 03:44:24,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:44:24,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:24,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:24,360 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:24,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 03:44:24,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:44:24,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:44:24,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 195 conjunts are in the unsatisfiable core [2022-11-03 03:44:24,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:38,144 WARN L234 SmtUtils]: Spent 10.37s on a formula simplification that was a NOOP. DAG size: 311 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:44:57,747 WARN L234 SmtUtils]: Spent 11.87s on a formula simplification that was a NOOP. DAG size: 311 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:45:17,155 WARN L234 SmtUtils]: Spent 10.31s on a formula simplification that was a NOOP. DAG size: 285 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:45:30,906 WARN L234 SmtUtils]: Spent 12.20s on a formula simplification that was a NOOP. DAG size: 301 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:45:42,615 WARN L234 SmtUtils]: Spent 10.43s on a formula simplification that was a NOOP. DAG size: 319 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:45:54,153 WARN L234 SmtUtils]: Spent 10.42s on a formula simplification that was a NOOP. DAG size: 312 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:46:18,076 WARN L234 SmtUtils]: Spent 10.28s on a formula simplification that was a NOOP. DAG size: 331 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:48:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:48:18,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 92 refuted. 4 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:50:17,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:17,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559877820] [2022-11-03 03:50:17,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559877820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:17,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [491004334] [2022-11-03 03:50:17,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:50:17,173 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:17,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:17,174 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:17,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329fd85-e12a-4ecb-ad4d-6588362a4d1e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 03:50:17,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:50:17,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:50:17,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 204 conjunts are in the unsatisfiable core [2022-11-03 03:50:17,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:51:35,413 WARN L234 SmtUtils]: Spent 10.39s on a formula simplification that was a NOOP. DAG size: 341 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:52:02,873 WARN L234 SmtUtils]: Spent 10.36s on a formula simplification that was a NOOP. DAG size: 341 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:52:34,084 WARN L234 SmtUtils]: Spent 10.34s on a formula simplification that was a NOOP. DAG size: 315 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:52:59,130 WARN L234 SmtUtils]: Spent 10.30s on a formula simplification that was a NOOP. DAG size: 363 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:53:48,721 WARN L234 SmtUtils]: Spent 10.31s on a formula simplification that was a NOOP. DAG size: 373 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)