./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/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_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/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_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/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 b2961e0c3cff6ba3de8f52f848e2cfbfe98366156ba986ccbf628e37437b6d1d --- 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 03:45:47,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:45:47,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:45:47,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:45:47,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:45:47,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:45:47,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:45:47,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:45:47,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:45:47,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:45:47,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:45:47,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:45:47,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:45:47,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:45:47,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:45:47,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:45:47,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:45:47,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:45:47,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:45:47,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:45:47,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:45:47,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:45:47,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:45:47,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:45:47,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:45:47,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:45:47,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:45:47,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:45:47,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:45:47,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:45:47,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:45:47,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:45:47,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:45:47,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:45:47,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:45:47,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:45:47,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:45:47,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:45:47,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:45:47,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:45:47,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:45:47,897 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:45:47,939 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:45:47,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:45:47,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:45:47,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:45:47,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:45:47,942 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:45:47,943 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:45:47,943 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:45:47,943 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:45:47,944 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:45:47,945 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:45:47,945 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:45:47,945 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:45:47,946 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:45:47,946 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:45:47,946 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:45:47,947 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:45:47,947 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:45:47,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:45:47,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:45:47,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:45:47,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:45:47,949 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:45:47,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:45:47,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:45:47,950 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:45:47,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:45:47,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:45:47,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:45:47,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:45:47,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:45:47,954 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:45:47,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:45:47,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:45:47,955 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:45:47,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:45:47,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:45:47,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:45:47,956 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_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2961e0c3cff6ba3de8f52f848e2cfbfe98366156ba986ccbf628e37437b6d1d [2022-11-03 03:45:48,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:45:48,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:45:48,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:45:48,286 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:45:48,287 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:45:48,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul1.c [2022-11-03 03:45:48,371 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/data/d62da8fb6/be4f69b3d03f4a0993f0baa089ad5f92/FLAG13deaa046 [2022-11-03 03:45:48,910 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:45:48,911 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul1.c [2022-11-03 03:45:48,918 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/data/d62da8fb6/be4f69b3d03f4a0993f0baa089ad5f92/FLAG13deaa046 [2022-11-03 03:45:49,241 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/data/d62da8fb6/be4f69b3d03f4a0993f0baa089ad5f92 [2022-11-03 03:45:49,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:45:49,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:45:49,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:45:49,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:45:49,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:45:49,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:45:49" (1/1) ... [2022-11-03 03:45:49,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51b41bd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49, skipping insertion in model container [2022-11-03 03:45:49,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:45:49" (1/1) ... [2022-11-03 03:45:49,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:45:49,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:45:49,429 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_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul1.c[1107,1120] [2022-11-03 03:45:49,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:45:49,512 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:45:49,523 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_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul1.c[1107,1120] [2022-11-03 03:45:49,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:45:49,566 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:45:49,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49 WrapperNode [2022-11-03 03:45:49,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:45:49,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:45:49,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:45:49,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:45:49,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2022-11-03 03:45:49,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2022-11-03 03:45:49,627 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 230 [2022-11-03 03:45:49,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:45:49,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:45:49,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:45:49,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:45:49,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2022-11-03 03:45:49,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2022-11-03 03:45:49,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2022-11-03 03:45:49,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2022-11-03 03:45:49,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2022-11-03 03:45:49,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2022-11-03 03:45:49,672 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2022-11-03 03:45:49,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2022-11-03 03:45:49,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:45:49,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:45:49,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:45:49,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:45:49,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2022-11-03 03:45:49,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:45:49,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:49,731 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:45:49,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:45:49,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:45:49,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:45:49,937 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:45:49,944 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:45:50,432 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:45:50,673 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:45:50,673 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:45:50,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:50 BoogieIcfgContainer [2022-11-03 03:45:50,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:45:50,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:45:50,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:45:50,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:45:50,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:45:49" (1/3) ... [2022-11-03 03:45:50,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615f66e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:45:50, skipping insertion in model container [2022-11-03 03:45:50,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (2/3) ... [2022-11-03 03:45:50,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615f66e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:45:50, skipping insertion in model container [2022-11-03 03:45:50,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:50" (3/3) ... [2022-11-03 03:45:50,689 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.mul1.c [2022-11-03 03:45:50,710 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:45:50,711 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:45:50,790 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:45:50,799 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;@6dff6157, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:45:50,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:45:50,803 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 03:45:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:45:50,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:50,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:45:50,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash 4538260, now seen corresponding path program 1 times [2022-11-03 03:45:50,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:50,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390336443] [2022-11-03 03:45:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:50,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:45:51,088 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:45:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:45:51,251 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:45:51,253 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:45:51,255 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:45:51,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:45:51,262 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:45:51,266 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:45:51,293 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:45:51,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:45:51 BoogieIcfgContainer [2022-11-03 03:45:51,305 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:45:51,307 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:45:51,308 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:45:51,308 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:45:51,310 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:50" (3/4) ... [2022-11-03 03:45:51,314 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:45:51,314 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:45:51,317 INFO L158 Benchmark]: Toolchain (without parser) took 2070.67ms. Allocated memory was 90.2MB in the beginning and 117.4MB in the end (delta: 27.3MB). Free memory was 50.8MB in the beginning and 72.5MB in the end (delta: -21.7MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2022-11-03 03:45:51,318 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 90.2MB. Free memory is still 67.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:45:51,319 INFO L158 Benchmark]: CACSL2BoogieTranslator took 320.42ms. Allocated memory is still 90.2MB. Free memory was 50.6MB in the beginning and 62.8MB in the end (delta: -12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 03:45:51,320 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.75ms. Allocated memory is still 90.2MB. Free memory was 62.8MB in the beginning and 59.3MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 03:45:51,322 INFO L158 Benchmark]: Boogie Preprocessor took 54.01ms. Allocated memory is still 90.2MB. Free memory was 59.3MB in the beginning and 57.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:45:51,327 INFO L158 Benchmark]: RCFGBuilder took 991.35ms. Allocated memory was 90.2MB in the beginning and 117.4MB in the end (delta: 27.3MB). Free memory was 57.2MB in the beginning and 47.9MB in the end (delta: 9.3MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. [2022-11-03 03:45:51,328 INFO L158 Benchmark]: TraceAbstraction took 627.17ms. Allocated memory is still 117.4MB. Free memory was 47.2MB in the beginning and 73.3MB in the end (delta: -26.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:45:51,330 INFO L158 Benchmark]: Witness Printer took 7.66ms. Allocated memory is still 117.4MB. Free memory was 73.3MB in the beginning and 73.3MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:45:51,338 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 90.2MB. Free memory is still 67.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 320.42ms. Allocated memory is still 90.2MB. Free memory was 50.6MB in the beginning and 62.8MB in the end (delta: -12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.75ms. Allocated memory is still 90.2MB. Free memory was 62.8MB in the beginning and 59.3MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.01ms. Allocated memory is still 90.2MB. Free memory was 59.3MB in the beginning and 57.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 991.35ms. Allocated memory was 90.2MB in the beginning and 117.4MB in the end (delta: 27.3MB). Free memory was 57.2MB in the beginning and 47.9MB in the end (delta: 9.3MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. * TraceAbstraction took 627.17ms. Allocated memory is still 117.4MB. Free memory was 47.2MB in the beginning and 73.3MB in the end (delta: -26.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 7.66ms. Allocated memory is still 117.4MB. Free memory was 73.3MB in the beginning and 73.3MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. 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 87, overapproximation of bitwiseAnd at line 74. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 32); [L29] const SORT_5 msb_SORT_5 = (SORT_5)1 << (32 - 1); [L31] const SORT_9 mask_SORT_9 = (SORT_9)-1 >> (sizeof(SORT_9) * 8 - 64); [L32] const SORT_9 msb_SORT_9 = (SORT_9)1 << (64 - 1); [L34] const SORT_9 var_10 = 0; [L35] const SORT_1 var_18 = 1; [L36] const SORT_5 var_22 = 0; [L38] SORT_1 input_2; [L39] SORT_1 input_3; [L40] SORT_1 input_4; [L41] SORT_5 input_6; [L42] SORT_5 input_7; [L43] SORT_1 input_8; [L45] SORT_9 state_11 = __VERIFIER_nondet_ulong() & mask_SORT_9; [L46] SORT_9 state_13 = __VERIFIER_nondet_ulong() & mask_SORT_9; [L47] SORT_5 state_23 = __VERIFIER_nondet_uint() & mask_SORT_5; [L48] SORT_5 state_25 = __VERIFIER_nondet_uint() & mask_SORT_5; [L49] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L50] SORT_1 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L51] SORT_5 state_31 = __VERIFIER_nondet_uint() & mask_SORT_5; [L52] SORT_5 state_33 = __VERIFIER_nondet_uint() & mask_SORT_5; [L54] SORT_9 init_12_arg_1 = var_10; [L55] state_11 = init_12_arg_1 [L56] SORT_9 init_14_arg_1 = var_10; [L57] state_13 = init_14_arg_1 [L58] SORT_5 init_24_arg_1 = var_22; [L59] state_23 = init_24_arg_1 [L60] SORT_5 init_26_arg_1 = var_22; [L61] state_25 = init_26_arg_1 [L62] SORT_1 init_28_arg_1 = var_18; [L63] state_27 = init_28_arg_1 [L64] SORT_1 init_30_arg_1 = var_18; [L65] state_29 = init_30_arg_1 [L66] SORT_5 init_32_arg_1 = var_22; [L67] state_31 = init_32_arg_1 [L68] SORT_5 init_34_arg_1 = var_22; [L69] state_33 = init_34_arg_1 VAL [init_12_arg_1=0, init_14_arg_1=0, init_24_arg_1=0, init_26_arg_1=0, init_28_arg_1=1, init_30_arg_1=1, init_32_arg_1=0, init_34_arg_1=0, mask_SORT_1=1, mask_SORT_5=4294967295, mask_SORT_9=18446744073709551615, msb_SORT_1=1, msb_SORT_5=2147483648, msb_SORT_9=9223372036854775808, state_11=0, state_13=0, state_23=0, state_25=0, state_27=1, state_29=1, state_31=0, state_33=0, var_10=0, var_18=1, var_22=0] [L72] input_2 = __VERIFIER_nondet_uchar() [L73] input_3 = __VERIFIER_nondet_uchar() [L74] input_3 = input_3 & mask_SORT_1 [L75] input_4 = __VERIFIER_nondet_uchar() [L76] input_4 = input_4 & mask_SORT_1 [L77] input_6 = __VERIFIER_nondet_uint() [L78] input_7 = __VERIFIER_nondet_uint() [L79] input_8 = __VERIFIER_nondet_uchar() [L80] input_8 = input_8 & mask_SORT_1 [L83] SORT_9 var_15_arg_0 = state_11; [L84] SORT_9 var_15_arg_1 = state_13; [L85] SORT_1 var_15 = var_15_arg_0 == var_15_arg_1; [L86] SORT_1 var_19_arg_0 = var_15; [L87] SORT_1 var_19 = ~var_19_arg_0; [L88] SORT_1 var_20_arg_0 = var_18; [L89] SORT_1 var_20_arg_1 = var_19; [L90] SORT_1 var_20 = var_20_arg_0 & var_20_arg_1; [L91] var_20 = var_20 & mask_SORT_1 [L92] SORT_1 bad_21_arg_0 = var_20; [L93] CALL __VERIFIER_assert(!(bad_21_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, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 03:45:51,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/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_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/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_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/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 b2961e0c3cff6ba3de8f52f848e2cfbfe98366156ba986ccbf628e37437b6d1d --- 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 03:45:53,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:45:53,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:45:53,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:45:53,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:45:53,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:45:53,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:45:53,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:45:53,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:45:53,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:45:53,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:45:53,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:45:53,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:45:53,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:45:53,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:45:53,937 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:45:53,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:45:53,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:45:53,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:45:53,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:45:53,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:45:53,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:45:53,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:45:53,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:45:53,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:45:53,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:45:53,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:45:53,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:45:53,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:45:53,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:45:53,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:45:53,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:45:53,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:45:53,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:45:54,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:45:54,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:45:54,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:45:54,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:45:54,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:45:54,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:45:54,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:45:54,014 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:45:54,055 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:45:54,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:45:54,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:45:54,057 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:45:54,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:45:54,058 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:45:54,058 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:45:54,058 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:45:54,058 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:45:54,058 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:45:54,059 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:45:54,060 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:45:54,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:45:54,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:45:54,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:45:54,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:45:54,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:45:54,062 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:45:54,062 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:45:54,062 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:45:54,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:45:54,063 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:45:54,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:45:54,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:45:54,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:45:54,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:45:54,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:45:54,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:45:54,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:45:54,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:45:54,064 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:45:54,065 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:45:54,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:45:54,065 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:45:54,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:45:54,066 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_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2961e0c3cff6ba3de8f52f848e2cfbfe98366156ba986ccbf628e37437b6d1d [2022-11-03 03:45:54,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:45:54,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:45:54,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:45:54,537 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:45:54,538 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:45:54,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul1.c [2022-11-03 03:45:54,617 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/data/d24db9de3/5eb557c21850401882ac492d80e19b0d/FLAGc71d39599 [2022-11-03 03:45:55,136 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:45:55,142 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul1.c [2022-11-03 03:45:55,149 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/data/d24db9de3/5eb557c21850401882ac492d80e19b0d/FLAGc71d39599 [2022-11-03 03:45:55,507 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/data/d24db9de3/5eb557c21850401882ac492d80e19b0d [2022-11-03 03:45:55,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:45:55,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:45:55,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:45:55,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:45:55,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:45:55,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:45:55" (1/1) ... [2022-11-03 03:45:55,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72562891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:55, skipping insertion in model container [2022-11-03 03:45:55,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:45:55" (1/1) ... [2022-11-03 03:45:55,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:45:55,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:45:55,694 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_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul1.c[1107,1120] [2022-11-03 03:45:55,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:45:55,808 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:45:55,843 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_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.mul1.c[1107,1120] [2022-11-03 03:45:55,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:45:55,886 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:45:55,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:55 WrapperNode [2022-11-03 03:45:55,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:45:55,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:45:55,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:45:55,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:45:55,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:55" (1/1) ... [2022-11-03 03:45:55,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:55" (1/1) ... [2022-11-03 03:45:55,933 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 230 [2022-11-03 03:45:55,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:45:55,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:45:55,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:45:55,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:45:55,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:55" (1/1) ... [2022-11-03 03:45:55,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:55" (1/1) ... [2022-11-03 03:45:55,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:55" (1/1) ... [2022-11-03 03:45:55,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:55" (1/1) ... [2022-11-03 03:45:55,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:55" (1/1) ... [2022-11-03 03:45:55,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:55" (1/1) ... [2022-11-03 03:45:55,977 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:55" (1/1) ... [2022-11-03 03:45:55,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:55" (1/1) ... [2022-11-03 03:45:55,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:45:55,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:45:55,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:45:55,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:45:55,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:55" (1/1) ... [2022-11-03 03:45:56,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:45:56,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:56,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:45:56,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:45:56,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:45:56,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:45:56,248 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:45:56,250 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:45:56,842 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:45:56,850 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:45:56,850 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:45:56,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:56 BoogieIcfgContainer [2022-11-03 03:45:56,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:45:56,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:45:56,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:45:56,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:45:56,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:45:55" (1/3) ... [2022-11-03 03:45:56,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6eee4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:45:56, skipping insertion in model container [2022-11-03 03:45:56,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:55" (2/3) ... [2022-11-03 03:45:56,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a6eee4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:45:56, skipping insertion in model container [2022-11-03 03:45:56,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:56" (3/3) ... [2022-11-03 03:45:56,867 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.mul1.c [2022-11-03 03:45:56,884 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:45:56,885 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:45:56,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:45:56,959 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;@1987340b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:45:56,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:45:56,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 36 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 03:45:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:45:56,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:56,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:45:56,971 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:56,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:56,977 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 03:45:56,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:45:56,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465357117] [2022-11-03 03:45:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:56,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:45:56,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:45:56,998 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:45:57,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:45:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:57,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:45:57,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:57,373 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 03:45:57,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:45:57,375 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:45:57,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465357117] [2022-11-03 03:45:57,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465357117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:57,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:57,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:45:57,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248548833] [2022-11-03 03:45:57,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:57,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:45:57,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:45:57,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:45:57,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:45:57,421 INFO L87 Difference]: Start difference. First operand has 37 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 36 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) 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 03:45:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:57,670 INFO L93 Difference]: Finished difference Result 98 states and 147 transitions. [2022-11-03 03:45:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:45:57,682 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 03:45:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:57,701 INFO L225 Difference]: With dead ends: 98 [2022-11-03 03:45:57,701 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 03:45:57,704 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 03:45:57,712 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 82 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:57,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 129 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:45:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 03:45:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 35. [2022-11-03 03:45:57,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:45:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 48 transitions. [2022-11-03 03:45:57,764 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 48 transitions. Word has length 5 [2022-11-03 03:45:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:57,766 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 48 transitions. [2022-11-03 03:45:57,766 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 03:45:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 48 transitions. [2022-11-03 03:45:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:45:57,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:57,769 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] [2022-11-03 03:45:57,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 03:45:57,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:45:57,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:57,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:57,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1126224685, now seen corresponding path program 1 times [2022-11-03 03:45:57,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:45:57,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072041473] [2022-11-03 03:45:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:57,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:45:57,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:45:57,986 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:45:57,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:45:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:58,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:45:58,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:58,361 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 03:45:58,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:45:58,361 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:45:58,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072041473] [2022-11-03 03:45:58,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072041473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:58,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:58,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:45:58,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737950487] [2022-11-03 03:45:58,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:58,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:45:58,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:45:58,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:45:58,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:45:58,365 INFO L87 Difference]: Start difference. First operand 35 states and 48 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 03:45:58,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:58,519 INFO L93 Difference]: Finished difference Result 70 states and 98 transitions. [2022-11-03 03:45:58,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:45:58,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 34 [2022-11-03 03:45:58,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:58,527 INFO L225 Difference]: With dead ends: 70 [2022-11-03 03:45:58,528 INFO L226 Difference]: Without dead ends: 39 [2022-11-03 03:45:58,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:45:58,530 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:58,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 126 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-11-03 03:45:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-03 03:45:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-03 03:45:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 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 03:45:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2022-11-03 03:45:58,537 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 34 [2022-11-03 03:45:58,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:58,537 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2022-11-03 03:45:58,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 03:45:58,538 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2022-11-03 03:45:58,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:45:58,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:58,539 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] [2022-11-03 03:45:58,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-03 03:45:58,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:45:58,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:58,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:58,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1245514577, now seen corresponding path program 1 times [2022-11-03 03:45:58,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:45:58,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595194647] [2022-11-03 03:45:58,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:58,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:45:58,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:45:58,762 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:45:58,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:45:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:59,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:45:59,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:59,451 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 03:45:59,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:45:59,451 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:45:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595194647] [2022-11-03 03:45:59,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595194647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:59,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:59,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:45:59,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965339090] [2022-11-03 03:45:59,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:59,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:45:59,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:45:59,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:45:59,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:45:59,455 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:45:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:59,615 INFO L93 Difference]: Finished difference Result 86 states and 120 transitions. [2022-11-03 03:45:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:45:59,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 34 [2022-11-03 03:45:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:59,619 INFO L225 Difference]: With dead ends: 86 [2022-11-03 03:45:59,620 INFO L226 Difference]: Without dead ends: 55 [2022-11-03 03:45:59,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:45:59,621 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:59,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 203 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-11-03 03:45:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-03 03:45:59,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-03 03:45:59,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.3888888888888888) internal successors, (75), 54 states have internal predecessors, (75), 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 03:45:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 75 transitions. [2022-11-03 03:45:59,635 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 75 transitions. Word has length 34 [2022-11-03 03:45:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:59,635 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 75 transitions. [2022-11-03 03:45:59,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:45:59,636 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 75 transitions. [2022-11-03 03:45:59,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:45:59,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:59,638 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:59,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:45:59,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:45:59,855 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:59,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:59,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1832320591, now seen corresponding path program 1 times [2022-11-03 03:45:59,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:45:59,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314596027] [2022-11-03 03:45:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:59,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:45:59,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:45:59,858 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:45:59,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:46:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:00,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:46:00,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:00,781 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 03:46:00,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:46:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:46:02,391 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:02,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314596027] [2022-11-03 03:46:02,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314596027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:46:02,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [872983863] [2022-11-03 03:46:02,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:02,395 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:46:02,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:46:02,398 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:46:02,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-03 03:46:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:02,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:46:02,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:03,162 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 03:46:03,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:46:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:46:03,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [872983863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:46:03,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80417935] [2022-11-03 03:46:03,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:03,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:46:03,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:46:03,718 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:46:03,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:46:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:03,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 03:46:03,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:04,334 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 03:46:04,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:46:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:46:04,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80417935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:46:04,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:46:04,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 12, 12] total 22 [2022-11-03 03:46:04,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864898367] [2022-11-03 03:46:04,858 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:46:04,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 03:46:04,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:04,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 03:46:04,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:46:04,860 INFO L87 Difference]: Start difference. First operand 55 states and 75 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 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 03:46:07,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:07,316 INFO L93 Difference]: Finished difference Result 216 states and 304 transitions. [2022-11-03 03:46:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 03:46:07,316 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 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 34 [2022-11-03 03:46:07,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:07,319 INFO L225 Difference]: With dead ends: 216 [2022-11-03 03:46:07,319 INFO L226 Difference]: Without dead ends: 214 [2022-11-03 03:46:07,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:46:07,321 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 411 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:07,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 1006 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 201 Unchecked, 0.5s Time] [2022-11-03 03:46:07,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-03 03:46:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 152. [2022-11-03 03:46:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4370860927152318) internal successors, (217), 151 states have internal predecessors, (217), 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 03:46:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 217 transitions. [2022-11-03 03:46:07,339 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 217 transitions. Word has length 34 [2022-11-03 03:46:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:07,340 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 217 transitions. [2022-11-03 03:46:07,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 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 03:46:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 217 transitions. [2022-11-03 03:46:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:46:07,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:07,342 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] [2022-11-03 03:46:07,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:07,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:07,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:07,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:07,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:07,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:07,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1972869201, now seen corresponding path program 1 times [2022-11-03 03:46:07,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:07,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421157342] [2022-11-03 03:46:07,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:07,950 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:07,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:07,953 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:07,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:46:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:08,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:46:08,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:08,303 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 03:46:08,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:08,303 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:08,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421157342] [2022-11-03 03:46:08,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421157342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:08,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:08,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:46:08,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657132377] [2022-11-03 03:46:08,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:08,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:46:08,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:08,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:46:08,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:46:08,305 INFO L87 Difference]: Start difference. First operand 152 states and 217 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:46:08,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:08,377 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2022-11-03 03:46:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:46:08,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 34 [2022-11-03 03:46:08,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:08,380 INFO L225 Difference]: With dead ends: 183 [2022-11-03 03:46:08,381 INFO L226 Difference]: Without dead ends: 140 [2022-11-03 03:46:08,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:46:08,382 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 4 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:08,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 215 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-03 03:46:08,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-03 03:46:08,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-11-03 03:46:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.4316546762589928) internal successors, (199), 139 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 03:46:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 199 transitions. [2022-11-03 03:46:08,407 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 199 transitions. Word has length 34 [2022-11-03 03:46:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:08,408 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 199 transitions. [2022-11-03 03:46:08,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:46:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 199 transitions. [2022-11-03 03:46:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:46:08,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:08,411 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] [2022-11-03 03:46:08,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:08,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:08,627 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:08,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:08,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1663249325, now seen corresponding path program 1 times [2022-11-03 03:46:08,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:08,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41719998] [2022-11-03 03:46:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:08,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:08,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:08,629 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:08,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:46:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:08,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:46:08,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:08,952 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 03:46:08,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:08,953 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:08,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41719998] [2022-11-03 03:46:08,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41719998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:08,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:08,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:46:08,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320461550] [2022-11-03 03:46:08,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:08,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:46:08,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:08,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:46:08,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:46:08,955 INFO L87 Difference]: Start difference. First operand 140 states and 199 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:46:09,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:09,131 INFO L93 Difference]: Finished difference Result 331 states and 475 transitions. [2022-11-03 03:46:09,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:46:09,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 34 [2022-11-03 03:46:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:09,132 INFO L225 Difference]: With dead ends: 331 [2022-11-03 03:46:09,132 INFO L226 Difference]: Without dead ends: 215 [2022-11-03 03:46:09,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:46:09,134 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 138 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:09,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 263 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-03 03:46:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-03 03:46:09,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 142. [2022-11-03 03:46:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.425531914893617) internal successors, (201), 141 states have internal predecessors, (201), 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 03:46:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 201 transitions. [2022-11-03 03:46:09,162 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 201 transitions. Word has length 34 [2022-11-03 03:46:09,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:09,162 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 201 transitions. [2022-11-03 03:46:09,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:46:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 201 transitions. [2022-11-03 03:46:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:46:09,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:09,164 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] [2022-11-03 03:46:09,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:09,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:09,379 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:09,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1522700715, now seen corresponding path program 1 times [2022-11-03 03:46:09,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:09,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557830350] [2022-11-03 03:46:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:09,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:09,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:09,386 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:09,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:46:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:09,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:46:09,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:09,691 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 03:46:09,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:09,691 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:09,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557830350] [2022-11-03 03:46:09,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557830350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:09,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:09,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:46:09,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474143331] [2022-11-03 03:46:09,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:09,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:46:09,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:09,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:46:09,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:46:09,693 INFO L87 Difference]: Start difference. First operand 142 states and 201 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:46:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:09,856 INFO L93 Difference]: Finished difference Result 351 states and 502 transitions. [2022-11-03 03:46:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:46:09,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 34 [2022-11-03 03:46:09,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:09,858 INFO L225 Difference]: With dead ends: 351 [2022-11-03 03:46:09,858 INFO L226 Difference]: Without dead ends: 235 [2022-11-03 03:46:09,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:46:09,860 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 38 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:09,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 247 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-11-03 03:46:09,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-03 03:46:09,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 146. [2022-11-03 03:46:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4206896551724137) internal successors, (206), 145 states have internal predecessors, (206), 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 03:46:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 206 transitions. [2022-11-03 03:46:09,878 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 206 transitions. Word has length 34 [2022-11-03 03:46:09,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:09,878 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 206 transitions. [2022-11-03 03:46:09,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:46:09,878 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 206 transitions. [2022-11-03 03:46:09,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:46:09,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:09,880 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] [2022-11-03 03:46:09,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:10,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:10,097 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:10,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:10,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1099998889, now seen corresponding path program 1 times [2022-11-03 03:46:10,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:10,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446560310] [2022-11-03 03:46:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:10,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:10,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:10,099 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:10,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:46:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:10,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:46:10,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:10,414 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 03:46:10,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:10,414 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:10,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446560310] [2022-11-03 03:46:10,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446560310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:10,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:10,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:46:10,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504845627] [2022-11-03 03:46:10,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:10,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:46:10,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:10,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:46:10,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:46:10,416 INFO L87 Difference]: Start difference. First operand 146 states and 206 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:46:10,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:10,571 INFO L93 Difference]: Finished difference Result 349 states and 497 transitions. [2022-11-03 03:46:10,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:46:10,572 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 34 [2022-11-03 03:46:10,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:10,573 INFO L225 Difference]: With dead ends: 349 [2022-11-03 03:46:10,574 INFO L226 Difference]: Without dead ends: 233 [2022-11-03 03:46:10,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:46:10,575 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 57 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:10,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 386 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-03 03:46:10,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-03 03:46:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 150. [2022-11-03 03:46:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.4161073825503356) internal successors, (211), 149 states have internal predecessors, (211), 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 03:46:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 211 transitions. [2022-11-03 03:46:10,584 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 211 transitions. Word has length 34 [2022-11-03 03:46:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:10,585 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 211 transitions. [2022-11-03 03:46:10,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:46:10,585 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 211 transitions. [2022-11-03 03:46:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:46:10,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:10,586 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] [2022-11-03 03:46:10,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:10,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:10,802 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:10,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:10,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1606620505, now seen corresponding path program 1 times [2022-11-03 03:46:10,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:10,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111989533] [2022-11-03 03:46:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:10,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:10,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:10,804 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:10,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:46:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:10,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:46:10,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:11,110 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 03:46:11,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:11,111 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:11,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111989533] [2022-11-03 03:46:11,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111989533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:11,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:11,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:46:11,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087275873] [2022-11-03 03:46:11,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:11,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:46:11,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:11,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:46:11,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:46:11,113 INFO L87 Difference]: Start difference. First operand 150 states and 211 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:46:11,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:11,263 INFO L93 Difference]: Finished difference Result 339 states and 481 transitions. [2022-11-03 03:46:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:46:11,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 34 [2022-11-03 03:46:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:11,268 INFO L225 Difference]: With dead ends: 339 [2022-11-03 03:46:11,268 INFO L226 Difference]: Without dead ends: 223 [2022-11-03 03:46:11,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:46:11,269 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 52 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:11,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 372 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-03 03:46:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-03 03:46:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 152. [2022-11-03 03:46:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4105960264900663) internal successors, (213), 151 states have internal predecessors, (213), 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 03:46:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 213 transitions. [2022-11-03 03:46:11,289 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 213 transitions. Word has length 34 [2022-11-03 03:46:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:11,289 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 213 transitions. [2022-11-03 03:46:11,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:46:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 213 transitions. [2022-11-03 03:46:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:46:11,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:11,291 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] [2022-11-03 03:46:11,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:11,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:11,506 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:11,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:11,506 INFO L85 PathProgramCache]: Analyzing trace with hash 326756827, now seen corresponding path program 1 times [2022-11-03 03:46:11,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:11,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130684020] [2022-11-03 03:46:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:11,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:11,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:11,509 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:11,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:46:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:11,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:46:11,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:11,799 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 03:46:11,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:11,800 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:11,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130684020] [2022-11-03 03:46:11,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130684020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:11,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:11,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:46:11,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635223052] [2022-11-03 03:46:11,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:11,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:46:11,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:11,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:46:11,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:46:11,802 INFO L87 Difference]: Start difference. First operand 152 states and 213 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:46:11,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:11,963 INFO L93 Difference]: Finished difference Result 313 states and 442 transitions. [2022-11-03 03:46:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:46:11,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 34 [2022-11-03 03:46:11,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:11,965 INFO L225 Difference]: With dead ends: 313 [2022-11-03 03:46:11,965 INFO L226 Difference]: Without dead ends: 197 [2022-11-03 03:46:11,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:46:11,967 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 39 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:11,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 338 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-11-03 03:46:11,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-03 03:46:11,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 158. [2022-11-03 03:46:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.4076433121019107) internal successors, (221), 157 states have internal predecessors, (221), 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 03:46:11,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 221 transitions. [2022-11-03 03:46:11,974 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 221 transitions. Word has length 34 [2022-11-03 03:46:11,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:11,975 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 221 transitions. [2022-11-03 03:46:11,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:46:11,975 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 221 transitions. [2022-11-03 03:46:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:46:11,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:11,976 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] [2022-11-03 03:46:11,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-03 03:46:12,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:12,192 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:12,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:12,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1006815197, now seen corresponding path program 1 times [2022-11-03 03:46:12,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:12,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113209787] [2022-11-03 03:46:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:12,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:12,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:12,195 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:12,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:46:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:12,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:46:12,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:12,548 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 03:46:12,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:12,548 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:12,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113209787] [2022-11-03 03:46:12,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113209787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:12,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:12,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:46:12,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078463490] [2022-11-03 03:46:12,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:12,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:46:12,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:12,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:46:12,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:46:12,550 INFO L87 Difference]: Start difference. First operand 158 states and 221 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:46:12,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:12,790 INFO L93 Difference]: Finished difference Result 297 states and 417 transitions. [2022-11-03 03:46:12,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:46:12,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 34 [2022-11-03 03:46:12,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:12,792 INFO L225 Difference]: With dead ends: 297 [2022-11-03 03:46:12,792 INFO L226 Difference]: Without dead ends: 181 [2022-11-03 03:46:12,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:46:12,793 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 37 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:12,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 279 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 23 Unchecked, 0.2s Time] [2022-11-03 03:46:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-03 03:46:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 162. [2022-11-03 03:46:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.4037267080745341) internal successors, (226), 161 states have internal predecessors, (226), 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 03:46:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 226 transitions. [2022-11-03 03:46:12,801 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 226 transitions. Word has length 34 [2022-11-03 03:46:12,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:12,801 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 226 transitions. [2022-11-03 03:46:12,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 03:46:12,801 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 226 transitions. [2022-11-03 03:46:12,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:46:12,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:12,803 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] [2022-11-03 03:46:12,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:13,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:46:13,027 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:13,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1008662239, now seen corresponding path program 1 times [2022-11-03 03:46:13,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:13,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582544974] [2022-11-03 03:46:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:13,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:13,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:13,030 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:13,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:46:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:13,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 03:46:13,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:14,009 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 03:46:14,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:46:41,092 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 03:46:41,092 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:41,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582544974] [2022-11-03 03:46:41,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582544974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:46:41,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [347315446] [2022-11-03 03:46:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:41,093 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:46:41,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:46:41,104 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:46:41,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 03:46:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:41,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 03:46:41,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:41,996 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 03:46:41,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:01,787 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 03:47:01,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [347315446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:01,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84695222] [2022-11-03 03:47:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:01,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:01,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:01,794 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:01,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 03:47:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:01,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 03:47:01,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:04,110 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 03:47:04,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:34,618 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 03:47:34,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84695222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:34,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:47:34,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 13, 13] total 31 [2022-11-03 03:47:34,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625940406] [2022-11-03 03:47:34,619 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:47:34,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 03:47:34,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:34,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 03:47:34,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=837, Unknown=9, NotChecked=0, Total=930 [2022-11-03 03:47:34,621 INFO L87 Difference]: Start difference. First operand 162 states and 226 transitions. Second operand has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 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 03:47:42,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:42,600 INFO L93 Difference]: Finished difference Result 171 states and 236 transitions. [2022-11-03 03:47:42,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 03:47:42,601 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 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 34 [2022-11-03 03:47:42,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:42,602 INFO L225 Difference]: With dead ends: 171 [2022-11-03 03:47:42,602 INFO L226 Difference]: Without dead ends: 169 [2022-11-03 03:47:42,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 79.2s TimeCoverageRelationStatistics Valid=181, Invalid=1450, Unknown=9, NotChecked=0, Total=1640 [2022-11-03 03:47:42,604 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 87 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:42,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1018 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 189 Unchecked, 0.2s Time] [2022-11-03 03:47:42,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-03 03:47:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2022-11-03 03:47:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.396341463414634) internal successors, (229), 164 states have internal predecessors, (229), 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 03:47:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 229 transitions. [2022-11-03 03:47:42,613 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 229 transitions. Word has length 34 [2022-11-03 03:47:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:42,613 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 229 transitions. [2022-11-03 03:47:42,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 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 03:47:42,614 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 229 transitions. [2022-11-03 03:47:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:47:42,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:42,615 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] [2022-11-03 03:47:42,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:42,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:43,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:43,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:43,232 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:43,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1694469839, now seen corresponding path program 1 times [2022-11-03 03:47:43,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:43,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697615925] [2022-11-03 03:47:43,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:43,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:43,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:43,235 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:43,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 03:47:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:43,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:43,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:44,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:44,862 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:44,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697615925] [2022-11-03 03:47:44,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697615925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:44,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [854276424] [2022-11-03 03:47:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:44,863 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:44,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:47:44,868 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:47:44,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 03:47:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:45,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:47:45,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:47:45,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:45,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [854276424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:45,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:47:45,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 17 [2022-11-03 03:47:45,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368193230] [2022-11-03 03:47:45,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:45,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:45,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:45,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:45,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:47:45,235 INFO L87 Difference]: Start difference. First operand 165 states and 229 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 03:47:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:45,620 INFO L93 Difference]: Finished difference Result 315 states and 444 transitions. [2022-11-03 03:47:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:45,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 63 [2022-11-03 03:47:45,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:45,622 INFO L225 Difference]: With dead ends: 315 [2022-11-03 03:47:45,622 INFO L226 Difference]: Without dead ends: 232 [2022-11-03 03:47:45,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:47:45,624 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 192 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:45,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 139 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:47:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-03 03:47:45,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 142. [2022-11-03 03:47:45,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3687943262411348) internal successors, (193), 141 states have internal predecessors, (193), 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 03:47:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 193 transitions. [2022-11-03 03:47:45,634 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 193 transitions. Word has length 63 [2022-11-03 03:47:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:45,634 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 193 transitions. [2022-11-03 03:47:45,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 03:47:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 193 transitions. [2022-11-03 03:47:45,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:47:45,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:45,636 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] [2022-11-03 03:47:45,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:45,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-03 03:47:46,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:46,039 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:46,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:46,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1354842673, now seen corresponding path program 1 times [2022-11-03 03:47:46,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:46,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446876594] [2022-11-03 03:47:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:46,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:46,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:46,042 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:46,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:47:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:46,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:46,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:46,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:47,672 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:47,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446876594] [2022-11-03 03:47:47,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446876594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:47,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1125510889] [2022-11-03 03:47:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:47,673 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:47,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:47:47,677 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:47:47,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 03:47:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:47,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:47:47,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:47:48,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:48,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1125510889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:48,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:47:48,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 17 [2022-11-03 03:47:48,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789307129] [2022-11-03 03:47:48,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:48,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:48,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:48,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:48,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:47:48,044 INFO L87 Difference]: Start difference. First operand 142 states and 193 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 03:47:48,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:48,420 INFO L93 Difference]: Finished difference Result 271 states and 376 transitions. [2022-11-03 03:47:48,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:48,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 63 [2022-11-03 03:47:48,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:48,430 INFO L225 Difference]: With dead ends: 271 [2022-11-03 03:47:48,430 INFO L226 Difference]: Without dead ends: 178 [2022-11-03 03:47:48,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:47:48,432 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 116 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:48,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 153 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:47:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-03 03:47:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 142. [2022-11-03 03:47:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3546099290780143) internal successors, (191), 141 states have internal predecessors, (191), 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 03:47:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 191 transitions. [2022-11-03 03:47:48,450 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 191 transitions. Word has length 63 [2022-11-03 03:47:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:48,451 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 191 transitions. [2022-11-03 03:47:48,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 03:47:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 191 transitions. [2022-11-03 03:47:48,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:47:48,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:48,454 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] [2022-11-03 03:47:48,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:48,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-11-03 03:47:48,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:48,878 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:48,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1214294063, now seen corresponding path program 1 times [2022-11-03 03:47:48,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:48,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176091006] [2022-11-03 03:47:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:48,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:48,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:48,880 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:48,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 03:47:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:49,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:49,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:49,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:50,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:50,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176091006] [2022-11-03 03:47:50,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176091006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:50,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1367604468] [2022-11-03 03:47:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:50,486 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:50,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:47:50,487 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:47:50,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-03 03:47:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:50,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:47:50,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:47:50,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:50,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1367604468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:50,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:47:50,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 17 [2022-11-03 03:47:50,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961560131] [2022-11-03 03:47:50,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:50,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:50,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:50,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:50,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:47:50,849 INFO L87 Difference]: Start difference. First operand 142 states and 191 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 03:47:51,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:51,242 INFO L93 Difference]: Finished difference Result 330 states and 454 transitions. [2022-11-03 03:47:51,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:51,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 63 [2022-11-03 03:47:51,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:51,254 INFO L225 Difference]: With dead ends: 330 [2022-11-03 03:47:51,254 INFO L226 Difference]: Without dead ends: 237 [2022-11-03 03:47:51,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:47:51,262 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 111 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:51,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 207 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:47:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-03 03:47:51,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 146. [2022-11-03 03:47:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3448275862068966) internal successors, (195), 145 states have internal predecessors, (195), 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 03:47:51,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 195 transitions. [2022-11-03 03:47:51,274 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 195 transitions. Word has length 63 [2022-11-03 03:47:51,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:51,275 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 195 transitions. [2022-11-03 03:47:51,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 03:47:51,275 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 195 transitions. [2022-11-03 03:47:51,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:47:51,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:51,276 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] [2022-11-03 03:47:51,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:51,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:51,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:51,699 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:51,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:51,699 INFO L85 PathProgramCache]: Analyzing trace with hash -791592237, now seen corresponding path program 1 times [2022-11-03 03:47:51,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:51,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438055366] [2022-11-03 03:47:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:51,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:51,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:51,701 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:51,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 03:47:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:52,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:52,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:52,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:53,187 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:53,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438055366] [2022-11-03 03:47:53,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438055366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:53,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1857030414] [2022-11-03 03:47:53,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:53,188 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:53,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:47:53,189 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:47:53,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 03:47:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:53,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:47:53,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:47:53,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:53,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1857030414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:53,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:47:53,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 17 [2022-11-03 03:47:53,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694787607] [2022-11-03 03:47:53,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:53,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:53,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:53,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:53,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:47:53,570 INFO L87 Difference]: Start difference. First operand 146 states and 195 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 03:47:54,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:54,013 INFO L93 Difference]: Finished difference Result 334 states and 455 transitions. [2022-11-03 03:47:54,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:54,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 63 [2022-11-03 03:47:54,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:54,016 INFO L225 Difference]: With dead ends: 334 [2022-11-03 03:47:54,016 INFO L226 Difference]: Without dead ends: 237 [2022-11-03 03:47:54,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:47:54,017 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 106 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:54,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 214 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:47:54,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-03 03:47:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 150. [2022-11-03 03:47:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.3355704697986577) internal successors, (199), 149 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 03:47:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 199 transitions. [2022-11-03 03:47:54,030 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 199 transitions. Word has length 63 [2022-11-03 03:47:54,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:54,031 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 199 transitions. [2022-11-03 03:47:54,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 03:47:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 199 transitions. [2022-11-03 03:47:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:47:54,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:54,033 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] [2022-11-03 03:47:54,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:54,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:54,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:54,436 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1915027157, now seen corresponding path program 1 times [2022-11-03 03:47:54,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:54,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823494635] [2022-11-03 03:47:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:54,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:54,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:54,438 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:54,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:47:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:54,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:54,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:55,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:55,885 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:55,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823494635] [2022-11-03 03:47:55,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823494635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:55,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1737098016] [2022-11-03 03:47:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:55,886 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:55,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:47:55,887 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:47:55,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 03:47:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:56,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:47:56,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:47:56,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:56,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1737098016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:56,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:47:56,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 17 [2022-11-03 03:47:56,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269080373] [2022-11-03 03:47:56,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:56,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:56,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:56,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:56,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:47:56,256 INFO L87 Difference]: Start difference. First operand 150 states and 199 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 03:47:56,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:56,664 INFO L93 Difference]: Finished difference Result 338 states and 456 transitions. [2022-11-03 03:47:56,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:56,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 63 [2022-11-03 03:47:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:56,668 INFO L225 Difference]: With dead ends: 338 [2022-11-03 03:47:56,668 INFO L226 Difference]: Without dead ends: 237 [2022-11-03 03:47:56,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:47:56,670 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 103 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:56,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 215 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:47:56,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-03 03:47:56,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 152. [2022-11-03 03:47:56,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.3245033112582782) internal successors, (200), 151 states have internal predecessors, (200), 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 03:47:56,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 200 transitions. [2022-11-03 03:47:56,680 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 200 transitions. Word has length 63 [2022-11-03 03:47:56,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:56,680 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 200 transitions. [2022-11-03 03:47:56,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 03:47:56,680 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 200 transitions. [2022-11-03 03:47:56,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:47:56,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:56,682 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] [2022-11-03 03:47:56,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:56,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:57,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:47:57,084 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:57,085 INFO L85 PathProgramCache]: Analyzing trace with hash 635163479, now seen corresponding path program 1 times [2022-11-03 03:47:57,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:57,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073207086] [2022-11-03 03:47:57,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:57,086 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:57,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:57,087 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:57,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 03:47:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:57,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:47:57,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:57,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:47:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:47:58,568 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:47:58,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073207086] [2022-11-03 03:47:58,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073207086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:47:58,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1235573783] [2022-11-03 03:47:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:58,569 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:58,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:47:58,575 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:47:58,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-03 03:47:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:58,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:47:58,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:47:58,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:58,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1235573783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:58,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:47:58,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 17 [2022-11-03 03:47:58,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633356871] [2022-11-03 03:47:58,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:58,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:47:58,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:47:58,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:47:58,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:47:58,977 INFO L87 Difference]: Start difference. First operand 152 states and 200 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 03:47:59,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:59,421 INFO L93 Difference]: Finished difference Result 344 states and 461 transitions. [2022-11-03 03:47:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:47:59,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 63 [2022-11-03 03:47:59,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:59,423 INFO L225 Difference]: With dead ends: 344 [2022-11-03 03:47:59,423 INFO L226 Difference]: Without dead ends: 241 [2022-11-03 03:47:59,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:47:59,424 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 95 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:59,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 226 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:47:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-03 03:47:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 158. [2022-11-03 03:47:59,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.3184713375796178) internal successors, (207), 157 states have internal predecessors, (207), 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 03:47:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 207 transitions. [2022-11-03 03:47:59,434 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 207 transitions. Word has length 63 [2022-11-03 03:47:59,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:59,434 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 207 transitions. [2022-11-03 03:47:59,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 03:47:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 207 transitions. [2022-11-03 03:47:59,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:47:59,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:59,436 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] [2022-11-03 03:47:59,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:59,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:59,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:47:59,851 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:59,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:59,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1315221849, now seen corresponding path program 1 times [2022-11-03 03:47:59,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:47:59,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41525990] [2022-11-03 03:47:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:59,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:47:59,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:47:59,853 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:47:59,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 03:48:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:00,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:48:00,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:00,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:01,327 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:01,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41525990] [2022-11-03 03:48:01,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41525990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:01,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [294992022] [2022-11-03 03:48:01,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:01,328 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:48:01,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:48:01,329 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:48:01,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 03:48:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:01,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:48:01,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:48:01,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:01,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [294992022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:01,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:48:01,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 17 [2022-11-03 03:48:01,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131518810] [2022-11-03 03:48:01,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:01,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:48:01,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:01,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:48:01,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:48:01,736 INFO L87 Difference]: Start difference. First operand 158 states and 207 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 03:48:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:02,228 INFO L93 Difference]: Finished difference Result 354 states and 471 transitions. [2022-11-03 03:48:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:48:02,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 63 [2022-11-03 03:48:02,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:02,231 INFO L225 Difference]: With dead ends: 354 [2022-11-03 03:48:02,231 INFO L226 Difference]: Without dead ends: 245 [2022-11-03 03:48:02,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:48:02,233 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 90 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:02,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 233 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:48:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-11-03 03:48:02,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 162. [2022-11-03 03:48:02,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.31055900621118) internal successors, (211), 161 states have internal predecessors, (211), 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 03:48:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 211 transitions. [2022-11-03 03:48:02,243 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 211 transitions. Word has length 63 [2022-11-03 03:48:02,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:02,244 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 211 transitions. [2022-11-03 03:48:02,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 03:48:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 211 transitions. [2022-11-03 03:48:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:48:02,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:02,245 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] [2022-11-03 03:48:02,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:02,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:02,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:48:02,660 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:02,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1317068891, now seen corresponding path program 1 times [2022-11-03 03:48:02,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:02,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766386296] [2022-11-03 03:48:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:02,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:02,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:02,662 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:02,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 03:48:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:02,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:48:02,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:03,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:04,111 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:48:04,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766386296] [2022-11-03 03:48:04,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766386296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:04,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [833099546] [2022-11-03 03:48:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:04,112 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:48:04,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:48:04,113 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:48:04,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 03:48:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:04,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:48:04,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:04,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:05,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [833099546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:05,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406493448] [2022-11-03 03:48:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:05,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:05,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:05,267 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:05,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 03:48:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:05,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:48:05,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:05,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:48:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:06,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406493448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:48:06,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:48:06,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2022-11-03 03:48:06,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508078848] [2022-11-03 03:48:06,210 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:48:06,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 03:48:06,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:48:06,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 03:48:06,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:48:06,212 INFO L87 Difference]: Start difference. First operand 162 states and 211 transitions. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 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 03:48:06,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:06,822 INFO L93 Difference]: Finished difference Result 370 states and 494 transitions. [2022-11-03 03:48:06,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:48:06,832 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 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 63 [2022-11-03 03:48:06,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:06,834 INFO L225 Difference]: With dead ends: 370 [2022-11-03 03:48:06,834 INFO L226 Difference]: Without dead ends: 286 [2022-11-03 03:48:06,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 358 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:48:06,835 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 144 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:06,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 725 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 51 Unchecked, 0.4s Time] [2022-11-03 03:48:06,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-11-03 03:48:06,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2022-11-03 03:48:06,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.3345195729537367) internal successors, (375), 281 states have internal predecessors, (375), 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 03:48:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 375 transitions. [2022-11-03 03:48:06,855 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 375 transitions. Word has length 63 [2022-11-03 03:48:06,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:06,856 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 375 transitions. [2022-11-03 03:48:06,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 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 03:48:06,856 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 375 transitions. [2022-11-03 03:48:06,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:48:06,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:06,857 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] [2022-11-03 03:48:06,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:07,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:07,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:07,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:48:07,465 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:07,465 INFO L85 PathProgramCache]: Analyzing trace with hash -606159143, now seen corresponding path program 1 times [2022-11-03 03:48:07,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:48:07,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539681827] [2022-11-03 03:48:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:07,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:48:07,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:48:07,467 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:48:07,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 03:48:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:07,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 03:48:07,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:09,498 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:09,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:50:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:22,103 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:50:22,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539681827] [2022-11-03 03:50:22,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539681827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:50:22,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1053303317] [2022-11-03 03:50:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:50:22,104 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:50:22,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:50:22,106 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:50:22,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 03:50:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:50:22,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-03 03:50:22,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:50:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:50:23,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:54:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:31,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1053303317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:54:31,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830611474] [2022-11-03 03:54:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:54:31,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:54:31,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:54:31,353 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:54:31,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42e3755d-bf85-4ecc-8f89-eeff8f9fce15/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 03:54:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:54:31,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 03:54:31,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:54:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:54:36,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:45,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830611474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:45,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:59:45,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 20, 20] total 55 [2022-11-03 03:59:45,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369910859] [2022-11-03 03:59:45,241 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:59:45,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 03:59:45,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:45,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 03:59:45,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2684, Unknown=115, NotChecked=0, Total=2970 [2022-11-03 03:59:45,244 INFO L87 Difference]: Start difference. First operand 282 states and 375 transitions. Second operand has 55 states, 55 states have (on average 3.2) internal successors, (176), 55 states have internal predecessors, (176), 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)