./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-func-interl.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_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/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_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/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_e149532b-de69-410a-9ac4-e13cdd7553a2/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 a944a36163c7b4fa5b48c60d1a0d4a18ecec257b1371681a86606945763c584d --- 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 03:32:06,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:32:06,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:32:06,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:32:06,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:32:06,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:32:06,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:32:06,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:32:06,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:32:06,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:32:06,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:32:06,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:32:06,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:32:06,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:32:06,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:32:06,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:32:06,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:32:06,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:32:06,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:32:06,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:32:06,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:32:06,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:32:06,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:32:06,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:32:06,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:32:06,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:32:06,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:32:06,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:32:06,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:32:06,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:32:06,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:32:06,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:32:06,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:32:06,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:32:06,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:32:06,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:32:06,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:32:06,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:32:06,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:32:06,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:32:06,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:32:06,890 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:32:06,911 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:32:06,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:32:06,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:32:06,912 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:32:06,913 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:32:06,913 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:32:06,913 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:32:06,913 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:32:06,914 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:32:06,914 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:32:06,914 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:32:06,914 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:32:06,914 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:32:06,915 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:32:06,915 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:32:06,915 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:32:06,915 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:32:06,916 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:32:06,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:32:06,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:32:06,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:32:06,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:32:06,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:32:06,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:32:06,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:32:06,918 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:32:06,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:32:06,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:32:06,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:32:06,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:32:06,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:32:06,919 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:32:06,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:32:06,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:32:06,920 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:32:06,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:32:06,920 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:32:06,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:32:06,921 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_e149532b-de69-410a-9ac4-e13cdd7553a2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a944a36163c7b4fa5b48c60d1a0d4a18ecec257b1371681a86606945763c584d [2022-11-03 03:32:07,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:32:07,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:32:07,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:32:07,251 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:32:07,252 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:32:07,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-func-interl.c [2022-11-03 03:32:07,344 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/data/1eb6b2ced/43126afd6f964f8bb56c8b5846aae1b6/FLAG050ace068 [2022-11-03 03:32:07,968 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:32:07,968 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-func-interl.c [2022-11-03 03:32:07,977 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/data/1eb6b2ced/43126afd6f964f8bb56c8b5846aae1b6/FLAG050ace068 [2022-11-03 03:32:08,255 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/data/1eb6b2ced/43126afd6f964f8bb56c8b5846aae1b6 [2022-11-03 03:32:08,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:32:08,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:32:08,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:32:08,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:32:08,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:32:08,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:32:08" (1/1) ... [2022-11-03 03:32:08,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c3c07c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:08, skipping insertion in model container [2022-11-03 03:32:08,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:32:08" (1/1) ... [2022-11-03 03:32:08,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:32:08,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:32:08,502 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_e149532b-de69-410a-9ac4-e13cdd7553a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-func-interl.c[1014,1027] [2022-11-03 03:32:08,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:32:08,713 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:32:08,724 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_e149532b-de69-410a-9ac4-e13cdd7553a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-func-interl.c[1014,1027] [2022-11-03 03:32:08,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:32:08,808 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:32:08,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:08 WrapperNode [2022-11-03 03:32:08,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:32:08,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:32:08,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:32:08,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:32:08,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:08" (1/1) ... [2022-11-03 03:32:08,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:08" (1/1) ... [2022-11-03 03:32:08,933 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 479 [2022-11-03 03:32:08,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:32:08,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:32:08,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:32:08,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:32:08,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:08" (1/1) ... [2022-11-03 03:32:08,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:08" (1/1) ... [2022-11-03 03:32:08,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:08" (1/1) ... [2022-11-03 03:32:08,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:08" (1/1) ... [2022-11-03 03:32:09,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:08" (1/1) ... [2022-11-03 03:32:09,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:08" (1/1) ... [2022-11-03 03:32:09,027 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:08" (1/1) ... [2022-11-03 03:32:09,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:08" (1/1) ... [2022-11-03 03:32:09,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:32:09,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:32:09,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:32:09,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:32:09,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:08" (1/1) ... [2022-11-03 03:32:09,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:32:09,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:09,075 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:32:09,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:32:09,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:32:09,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:32:09,380 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:32:09,383 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:32:17,037 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:32:18,600 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:32:18,600 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:32:18,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:18 BoogieIcfgContainer [2022-11-03 03:32:18,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:32:18,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:32:18,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:32:18,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:32:18,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:32:08" (1/3) ... [2022-11-03 03:32:18,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47338270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:32:18, skipping insertion in model container [2022-11-03 03:32:18,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:08" (2/3) ... [2022-11-03 03:32:18,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47338270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:32:18, skipping insertion in model container [2022-11-03 03:32:18,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:18" (3/3) ... [2022-11-03 03:32:18,612 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.adding.2.prop1-func-interl.c [2022-11-03 03:32:18,631 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:32:18,631 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:32:18,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:32:18,710 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;@6e8653b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:32:18,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:32:18,715 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 03:32:18,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:32:18,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:18,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:32:18,727 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:18,735 INFO L85 PathProgramCache]: Analyzing trace with hash 4467594, now seen corresponding path program 1 times [2022-11-03 03:32:18,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:18,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949629562] [2022-11-03 03:32:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:18,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:32:19,212 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 03:32:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 03:32:19,566 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 03:32:19,568 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 03:32:19,570 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 03:32:19,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:32:19,578 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 03:32:19,582 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 03:32:19,612 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 03:32:19,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 03:32:19 BoogieIcfgContainer [2022-11-03 03:32:19,622 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 03:32:19,625 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 03:32:19,625 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 03:32:19,625 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 03:32:19,627 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:18" (3/4) ... [2022-11-03 03:32:19,631 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 03:32:19,632 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 03:32:19,634 INFO L158 Benchmark]: Toolchain (without parser) took 11373.35ms. Allocated memory was 119.5MB in the beginning and 383.8MB in the end (delta: 264.2MB). Free memory was 86.7MB in the beginning and 155.3MB in the end (delta: -68.6MB). Peak memory consumption was 196.7MB. Max. memory is 16.1GB. [2022-11-03 03:32:19,635 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 88.1MB. Free memory is still 44.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:32:19,636 INFO L158 Benchmark]: CACSL2BoogieTranslator took 548.29ms. Allocated memory is still 119.5MB. Free memory was 86.4MB in the beginning and 84.8MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 03:32:19,638 INFO L158 Benchmark]: Boogie Procedure Inliner took 123.75ms. Allocated memory is still 119.5MB. Free memory was 84.8MB in the beginning and 71.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 03:32:19,639 INFO L158 Benchmark]: Boogie Preprocessor took 108.50ms. Allocated memory is still 119.5MB. Free memory was 71.7MB in the beginning and 64.9MB in the end (delta: 6.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-03 03:32:19,644 INFO L158 Benchmark]: RCFGBuilder took 9559.26ms. Allocated memory was 119.5MB in the beginning and 383.8MB in the end (delta: 264.2MB). Free memory was 64.9MB in the beginning and 225.5MB in the end (delta: -160.7MB). Peak memory consumption was 176.5MB. Max. memory is 16.1GB. [2022-11-03 03:32:19,646 INFO L158 Benchmark]: TraceAbstraction took 1017.05ms. Allocated memory is still 383.8MB. Free memory was 224.5MB in the beginning and 156.3MB in the end (delta: 68.2MB). Peak memory consumption was 69.2MB. Max. memory is 16.1GB. [2022-11-03 03:32:19,648 INFO L158 Benchmark]: Witness Printer took 7.38ms. Allocated memory is still 383.8MB. Free memory is still 155.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:32:19,650 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 88.1MB. Free memory is still 44.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 548.29ms. Allocated memory is still 119.5MB. Free memory was 86.4MB in the beginning and 84.8MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 123.75ms. Allocated memory is still 119.5MB. Free memory was 84.8MB in the beginning and 71.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 108.50ms. Allocated memory is still 119.5MB. Free memory was 71.7MB in the beginning and 64.9MB in the end (delta: 6.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * RCFGBuilder took 9559.26ms. Allocated memory was 119.5MB in the beginning and 383.8MB in the end (delta: 264.2MB). Free memory was 64.9MB in the beginning and 225.5MB in the end (delta: -160.7MB). Peak memory consumption was 176.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1017.05ms. Allocated memory is still 383.8MB. Free memory was 224.5MB in the beginning and 156.3MB in the end (delta: 68.2MB). Peak memory consumption was 69.2MB. Max. memory is 16.1GB. * Witness Printer took 7.38ms. Allocated memory is still 383.8MB. Free memory is still 155.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 104, overapproximation of shiftRight at line 108, overapproximation of bitwiseAnd at line 86, overapproximation of bitwiseComplement at line 106, overapproximation of bitwiseXOr at line 101. 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_2 mask_SORT_2 = (SORT_2)-1 >> (sizeof(SORT_2) * 8 - 5); [L29] const SORT_2 msb_SORT_2 = (SORT_2)1 << (5 - 1); [L31] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 16); [L32] const SORT_3 msb_SORT_3 = (SORT_3)1 << (16 - 1); [L34] const SORT_4 mask_SORT_4 = (SORT_4)-1 >> (sizeof(SORT_4) * 8 - 32); [L35] const SORT_4 msb_SORT_4 = (SORT_4)1 << (32 - 1); [L37] const SORT_3 var_5 = 0; [L38] const SORT_1 var_12 = 0; [L39] const SORT_4 var_27 = 500; [L40] const SORT_3 var_28 = 1; [L41] const SORT_3 var_30 = 0; [L42] const SORT_4 var_32 = 16; [L43] const SORT_4 var_79 = 200; [L45] SORT_1 input_37; [L46] SORT_1 input_38; [L47] SORT_1 input_43; [L48] SORT_1 input_48; [L49] SORT_1 input_52; [L50] SORT_1 input_57; [L52] SORT_3 state_6 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L53] SORT_3 state_8 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L54] SORT_3 state_10 = __VERIFIER_nondet_ushort() & mask_SORT_3; [L55] SORT_1 state_13 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L56] SORT_1 state_15 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L57] SORT_1 state_17 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L58] SORT_1 state_19 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L59] SORT_1 state_21 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L60] SORT_1 state_23 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L61] SORT_1 state_25 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L63] SORT_3 init_7_arg_1 = var_5; [L64] state_6 = init_7_arg_1 [L65] SORT_3 init_9_arg_1 = var_5; [L66] state_8 = init_9_arg_1 [L67] SORT_3 init_11_arg_1 = var_5; [L68] state_10 = init_11_arg_1 [L69] SORT_1 init_14_arg_1 = var_12; [L70] state_13 = init_14_arg_1 [L71] SORT_1 init_16_arg_1 = var_12; [L72] state_15 = init_16_arg_1 [L73] SORT_1 init_18_arg_1 = var_12; [L74] state_17 = init_18_arg_1 [L75] SORT_1 init_20_arg_1 = var_12; [L76] state_19 = init_20_arg_1 [L77] SORT_1 init_22_arg_1 = var_12; [L78] state_21 = init_22_arg_1 [L79] SORT_1 init_24_arg_1 = var_12; [L80] state_23 = init_24_arg_1 [L81] SORT_1 init_26_arg_1 = var_12; [L82] state_25 = init_26_arg_1 VAL [init_11_arg_1=0, init_14_arg_1=0, init_16_arg_1=0, init_18_arg_1=0, init_20_arg_1=0, init_22_arg_1=0, init_24_arg_1=0, init_26_arg_1=0, init_7_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_2=31, mask_SORT_3=65535, mask_SORT_4=4294967295, msb_SORT_1=1, msb_SORT_2=16, msb_SORT_3=32768, msb_SORT_4=2147483648, state_10=0, state_13=0, state_15=0, state_17=0, state_19=0, state_21=0, state_23=0, state_25=0, state_6=0, state_8=0, var_12=0, var_27=500, var_28=1, var_30=0, var_32=16, var_5=0, var_79=200] [L85] input_37 = __VERIFIER_nondet_uchar() [L86] input_37 = input_37 & mask_SORT_1 [L87] input_38 = __VERIFIER_nondet_uchar() [L88] input_38 = input_38 & mask_SORT_1 [L89] input_43 = __VERIFIER_nondet_uchar() [L90] input_43 = input_43 & mask_SORT_1 [L91] input_48 = __VERIFIER_nondet_uchar() [L92] input_48 = input_48 & mask_SORT_1 [L93] input_52 = __VERIFIER_nondet_uchar() [L94] input_52 = input_52 & mask_SORT_1 [L95] input_57 = __VERIFIER_nondet_uchar() [L96] input_57 = input_57 & mask_SORT_1 [L99] SORT_3 var_29_arg_0 = var_28; [L100] SORT_3 var_29_arg_1 = state_6; [L101] SORT_3 var_29 = var_29_arg_0 ^ var_29_arg_1; [L102] SORT_3 var_31_arg_0 = var_29; [L103] SORT_3 var_31_arg_1 = var_30; [L104] SORT_4 var_31 = ((SORT_4)var_31_arg_0 << 16) | var_31_arg_1; [L105] SORT_4 var_33_arg_0 = var_31; [L106] EXPR (var_33_arg_0 & msb_SORT_4) ? (var_33_arg_0 | ~mask_SORT_4) : (var_33_arg_0 & mask_SORT_4) [L106] var_33_arg_0 = (var_33_arg_0 & msb_SORT_4) ? (var_33_arg_0 | ~mask_SORT_4) : (var_33_arg_0 & mask_SORT_4) [L107] SORT_4 var_33_arg_1 = var_32; [L108] SORT_4 var_33 = (int)var_33_arg_0 >> var_33_arg_1; [L109] EXPR (var_33_arg_0 & msb_SORT_4) ? (var_33 | ~(mask_SORT_4 >> var_33_arg_1)) : var_33 [L109] var_33 = (var_33_arg_0 & msb_SORT_4) ? (var_33 | ~(mask_SORT_4 >> var_33_arg_1)) : var_33 [L110] var_33 = var_33 & mask_SORT_4 [L111] SORT_4 var_34_arg_0 = var_27; [L112] SORT_4 var_34_arg_1 = var_33; [L113] SORT_1 var_34 = var_34_arg_0 == var_34_arg_1; [L114] SORT_1 var_35_arg_0 = ~state_25; [L115] var_35_arg_0 = var_35_arg_0 & mask_SORT_1 [L116] SORT_1 var_35_arg_1 = var_34; [L117] SORT_1 var_35 = var_35_arg_0 & var_35_arg_1; [L118] var_35 = var_35 & mask_SORT_1 [L119] SORT_1 bad_36_arg_0 = var_35; [L120] CALL __VERIFIER_assert(!(bad_36_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: 0.9s, 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, 0.4s 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 03:32:19,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/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_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/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_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/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_e149532b-de69-410a-9ac4-e13cdd7553a2/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 a944a36163c7b4fa5b48c60d1a0d4a18ecec257b1371681a86606945763c584d --- 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 03:32:22,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:32:22,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:32:22,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:32:22,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:32:22,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:32:22,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:32:22,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:32:22,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:32:22,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:32:22,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:32:22,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:32:22,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:32:22,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:32:22,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:32:22,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:32:22,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:32:22,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:32:22,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:32:22,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:32:22,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:32:22,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:32:22,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:32:22,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:32:22,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:32:22,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:32:22,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:32:22,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:32:22,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:32:22,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:32:22,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:32:22,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:32:22,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:32:22,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:32:22,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:32:22,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:32:22,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:32:22,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:32:22,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:32:22,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:32:22,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:32:22,098 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 03:32:22,149 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:32:22,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:32:22,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:32:22,157 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:32:22,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:32:22,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:32:22,159 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:32:22,159 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:32:22,159 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:32:22,160 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:32:22,161 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:32:22,161 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:32:22,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:32:22,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:32:22,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:32:22,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:32:22,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:32:22,164 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:32:22,164 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:32:22,164 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:32:22,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:32:22,164 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:32:22,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:32:22,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:32:22,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:32:22,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:32:22,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:32:22,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:32:22,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:32:22,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:32:22,166 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:32:22,167 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:22,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:32:22,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:32:22,168 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:32:22,168 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_e149532b-de69-410a-9ac4-e13cdd7553a2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a944a36163c7b4fa5b48c60d1a0d4a18ecec257b1371681a86606945763c584d [2022-11-03 03:32:22,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:32:22,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:32:22,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:32:22,648 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:32:22,649 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:32:22,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-func-interl.c [2022-11-03 03:32:22,715 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/data/908ec6e09/3d7ea6508e9c46f78e5060fb5d28137d/FLAG12cbe635b [2022-11-03 03:32:23,359 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:32:23,360 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-func-interl.c [2022-11-03 03:32:23,381 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/data/908ec6e09/3d7ea6508e9c46f78e5060fb5d28137d/FLAG12cbe635b [2022-11-03 03:32:23,644 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/data/908ec6e09/3d7ea6508e9c46f78e5060fb5d28137d [2022-11-03 03:32:23,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:32:23,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:32:23,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:32:23,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:32:23,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:32:23,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:32:23" (1/1) ... [2022-11-03 03:32:23,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e77ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:23, skipping insertion in model container [2022-11-03 03:32:23,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:32:23" (1/1) ... [2022-11-03 03:32:23,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:32:23,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:32:23,846 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_e149532b-de69-410a-9ac4-e13cdd7553a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-func-interl.c[1014,1027] [2022-11-03 03:32:24,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:32:24,006 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:32:24,017 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_e149532b-de69-410a-9ac4-e13cdd7553a2/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.adding.2.prop1-func-interl.c[1014,1027] [2022-11-03 03:32:24,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:32:24,097 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:32:24,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:24 WrapperNode [2022-11-03 03:32:24,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:32:24,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:32:24,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:32:24,099 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:32:24,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:24" (1/1) ... [2022-11-03 03:32:24,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:24" (1/1) ... [2022-11-03 03:32:24,176 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 479 [2022-11-03 03:32:24,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:32:24,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:32:24,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:32:24,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:32:24,194 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:24" (1/1) ... [2022-11-03 03:32:24,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:24" (1/1) ... [2022-11-03 03:32:24,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:24" (1/1) ... [2022-11-03 03:32:24,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:24" (1/1) ... [2022-11-03 03:32:24,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:24" (1/1) ... [2022-11-03 03:32:24,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:24" (1/1) ... [2022-11-03 03:32:24,254 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:24" (1/1) ... [2022-11-03 03:32:24,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:24" (1/1) ... [2022-11-03 03:32:24,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:32:24,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:32:24,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:32:24,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:32:24,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:24" (1/1) ... [2022-11-03 03:32:24,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:32:24,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:24,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:32:24,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:32:24,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:32:24,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:32:24,623 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:32:24,626 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:32:25,395 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:32:25,403 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:32:25,403 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:32:25,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:25 BoogieIcfgContainer [2022-11-03 03:32:25,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:32:25,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:32:25,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:32:25,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:32:25,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:32:23" (1/3) ... [2022-11-03 03:32:25,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3005cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:32:25, skipping insertion in model container [2022-11-03 03:32:25,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:24" (2/3) ... [2022-11-03 03:32:25,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3005cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:32:25, skipping insertion in model container [2022-11-03 03:32:25,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:25" (3/3) ... [2022-11-03 03:32:25,414 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.adding.2.prop1-func-interl.c [2022-11-03 03:32:25,440 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:32:25,440 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:32:25,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:32:25,518 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;@21f18b90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:32:25,518 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:32:25,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 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 03:32:25,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:32:25,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:25,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:25,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:25,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:25,537 INFO L85 PathProgramCache]: Analyzing trace with hash -332259343, now seen corresponding path program 1 times [2022-11-03 03:32:25,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:25,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772506849] [2022-11-03 03:32:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:25,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:25,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:25,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:25,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:32:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:32:25,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:25,916 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 03:32:25,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:25,917 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:25,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772506849] [2022-11-03 03:32:25,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772506849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:25,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:25,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:32:25,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317955462] [2022-11-03 03:32:25,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:25,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:32:25,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:25,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:32:25,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:32:25,956 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 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 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 03:32:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:26,059 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2022-11-03 03:32:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:32:26,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-03 03:32:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:26,070 INFO L225 Difference]: With dead ends: 66 [2022-11-03 03:32:26,070 INFO L226 Difference]: Without dead ends: 33 [2022-11-03 03:32:26,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 03:32:26,077 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:26,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 15 Unchecked, 0.1s Time] [2022-11-03 03:32:26,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-03 03:32:26,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-03 03:32:26,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 0 states have call successors, (0), 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 03:32:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2022-11-03 03:32:26,111 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 9 [2022-11-03 03:32:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:26,112 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2022-11-03 03:32:26,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 03:32:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2022-11-03 03:32:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:32:26,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:26,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:26,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:26,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:26,334 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:26,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:26,334 INFO L85 PathProgramCache]: Analyzing trace with hash -275001041, now seen corresponding path program 1 times [2022-11-03 03:32:26,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:26,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107967017] [2022-11-03 03:32:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:26,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:26,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:26,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:26,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:32:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:26,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:32:26,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:26,615 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 03:32:26,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:26,615 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:26,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107967017] [2022-11-03 03:32:26,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107967017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:26,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:26,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:32:26,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076078151] [2022-11-03 03:32:26,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:26,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:32:26,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:26,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:32:26,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:32:26,619 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 03:32:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:26,703 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2022-11-03 03:32:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:32:26,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-03 03:32:26,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:26,705 INFO L225 Difference]: With dead ends: 64 [2022-11-03 03:32:26,705 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 03:32:26,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:32:26,707 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:26,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 150 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-03 03:32:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 03:32:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-03 03:32:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 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 03:32:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2022-11-03 03:32:26,714 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 9 [2022-11-03 03:32:26,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:26,714 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-11-03 03:32:26,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 03:32:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2022-11-03 03:32:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:32:26,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:26,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:26,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:26,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:26,927 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:26,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash -274941459, now seen corresponding path program 1 times [2022-11-03 03:32:26,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:26,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068156000] [2022-11-03 03:32:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:26,929 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:26,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:26,936 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:26,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:32:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:27,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 03:32:27,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:27,464 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 03:32:27,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:27,464 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:27,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068156000] [2022-11-03 03:32:27,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068156000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:27,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:27,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:32:27,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990713420] [2022-11-03 03:32:27,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:27,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:32:27,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:27,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:32:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:32:27,468 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 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 03:32:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:27,583 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2022-11-03 03:32:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:32:27,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-03 03:32:27,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:27,588 INFO L225 Difference]: With dead ends: 65 [2022-11-03 03:32:27,588 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 03:32:27,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:32:27,590 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 39 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:27,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 228 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2022-11-03 03:32:27,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 03:32:27,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 37. [2022-11-03 03:32:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 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 03:32:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-11-03 03:32:27,599 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 9 [2022-11-03 03:32:27,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:27,599 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-11-03 03:32:27,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 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 03:32:27,599 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-11-03 03:32:27,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:32:27,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:27,600 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:27,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:27,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:27,812 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:27,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:27,812 INFO L85 PathProgramCache]: Analyzing trace with hash 649010465, now seen corresponding path program 1 times [2022-11-03 03:32:27,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:27,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727567662] [2022-11-03 03:32:27,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:27,814 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:27,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:27,815 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:27,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:32:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:28,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:32:28,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:28,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:28,276 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:28,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727567662] [2022-11-03 03:32:28,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727567662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:28,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:28,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:32:28,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582206848] [2022-11-03 03:32:28,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:28,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:32:28,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:28,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:32:28,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:32:28,286 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:28,376 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2022-11-03 03:32:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:32:28,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:32:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:28,377 INFO L225 Difference]: With dead ends: 72 [2022-11-03 03:32:28,378 INFO L226 Difference]: Without dead ends: 43 [2022-11-03 03:32:28,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:32:28,379 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:28,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 91 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-11-03 03:32:28,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-03 03:32:28,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-03 03:32:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 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 03:32:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2022-11-03 03:32:28,395 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 36 [2022-11-03 03:32:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:28,395 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2022-11-03 03:32:28,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2022-11-03 03:32:28,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:32:28,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:28,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:28,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:28,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:28,621 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:28,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:28,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1156427869, now seen corresponding path program 1 times [2022-11-03 03:32:28,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:28,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322988143] [2022-11-03 03:32:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:28,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:28,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:28,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:28,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:32:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:32:28,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:29,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:29,084 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:29,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322988143] [2022-11-03 03:32:29,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322988143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:29,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:29,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:32:29,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128227191] [2022-11-03 03:32:29,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:29,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:32:29,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:29,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:32:29,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:32:29,095 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:29,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:29,185 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-11-03 03:32:29,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:32:29,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:32:29,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:29,186 INFO L225 Difference]: With dead ends: 74 [2022-11-03 03:32:29,186 INFO L226 Difference]: Without dead ends: 45 [2022-11-03 03:32:29,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:32:29,188 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:29,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-03 03:32:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-03 03:32:29,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-03 03:32:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 0 states have call successors, (0), 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 03:32:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2022-11-03 03:32:29,194 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 36 [2022-11-03 03:32:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:29,194 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2022-11-03 03:32:29,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:29,194 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2022-11-03 03:32:29,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:32:29,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:29,195 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:29,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:29,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:29,410 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:29,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:29,411 INFO L85 PathProgramCache]: Analyzing trace with hash -733726043, now seen corresponding path program 1 times [2022-11-03 03:32:29,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:29,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722643297] [2022-11-03 03:32:29,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:29,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:29,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:29,413 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:29,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:32:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:29,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:32:29,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:31,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:31,226 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:31,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722643297] [2022-11-03 03:32:31,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722643297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:31,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:31,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:32:31,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619669208] [2022-11-03 03:32:31,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:31,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:32:31,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:31,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:32:31,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2022-11-03 03:32:31,228 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:31,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:31,325 INFO L93 Difference]: Finished difference Result 82 states and 112 transitions. [2022-11-03 03:32:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:32:31,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:32:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:31,327 INFO L225 Difference]: With dead ends: 82 [2022-11-03 03:32:31,327 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 03:32:31,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2022-11-03 03:32:31,328 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:31,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 139 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-03 03:32:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 03:32:31,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-03 03:32:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 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 03:32:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-11-03 03:32:31,334 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 36 [2022-11-03 03:32:31,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:31,334 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-11-03 03:32:31,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:31,335 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-11-03 03:32:31,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:32:31,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:31,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:31,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:31,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:31,537 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:31,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1320532057, now seen corresponding path program 1 times [2022-11-03 03:32:31,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:31,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961375197] [2022-11-03 03:32:31,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:31,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:31,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:31,544 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:31,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 03:32:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:31,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:32:31,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:32,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:32,575 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:32,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961375197] [2022-11-03 03:32:32,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961375197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:32,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [603365680] [2022-11-03 03:32:32,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:32,576 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:32,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:32,581 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:32,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-03 03:32:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:33,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:32:33,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:33,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:33,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [603365680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:33,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656513460] [2022-11-03 03:32:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:33,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:33,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:33,493 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:33,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:32:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:33,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:32:33,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:33,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:34,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656513460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:34,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:32:34,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2022-11-03 03:32:34,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853459137] [2022-11-03 03:32:34,121 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:34,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 03:32:34,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:34,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 03:32:34,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:32:34,123 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 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 03:32:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:34,355 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2022-11-03 03:32:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:32:34,364 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:32:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:34,365 INFO L225 Difference]: With dead ends: 103 [2022-11-03 03:32:34,365 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 03:32:34,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:32:34,366 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:34,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 265 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 163 Unchecked, 0.1s Time] [2022-11-03 03:32:34,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 03:32:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-03 03:32:34,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2022-11-03 03:32:34,374 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 36 [2022-11-03 03:32:34,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:34,374 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2022-11-03 03:32:34,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 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 03:32:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2022-11-03 03:32:34,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:32:34,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:34,375 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:34,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:34,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:34,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:34,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:34,997 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:34,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:34,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1263273755, now seen corresponding path program 1 times [2022-11-03 03:32:34,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:34,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298516433] [2022-11-03 03:32:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:34,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:34,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:34,999 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:35,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 03:32:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:32:35,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:35,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:36,038 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:36,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298516433] [2022-11-03 03:32:36,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298516433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:36,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2091816325] [2022-11-03 03:32:36,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:36,039 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:36,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:36,041 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:36,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-03 03:32:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:36,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:32:36,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:36,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:36,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2091816325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:36,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721996363] [2022-11-03 03:32:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:36,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:36,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:36,941 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:36,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:32:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:37,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:32:37,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:32:37,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:32:37,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721996363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:37,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-03 03:32:37,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9, 9, 9] total 19 [2022-11-03 03:32:37,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269741076] [2022-11-03 03:32:37,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:37,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:32:37,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:32:37,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:32:37,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:32:37,412 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 03:32:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:37,450 INFO L93 Difference]: Finished difference Result 139 states and 188 transitions. [2022-11-03 03:32:37,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:32:37,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:32:37,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:37,453 INFO L225 Difference]: With dead ends: 139 [2022-11-03 03:32:37,453 INFO L226 Difference]: Without dead ends: 110 [2022-11-03 03:32:37,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 153 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:32:37,455 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:37,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 119 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-11-03 03:32:37,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-03 03:32:37,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2022-11-03 03:32:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.355140186915888) internal successors, (145), 107 states have internal predecessors, (145), 0 states have call successors, (0), 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 03:32:37,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 145 transitions. [2022-11-03 03:32:37,478 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 145 transitions. Word has length 36 [2022-11-03 03:32:37,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:37,480 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 145 transitions. [2022-11-03 03:32:37,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 03:32:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 145 transitions. [2022-11-03 03:32:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:32:37,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:37,483 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:37,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:37,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:37,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:38,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:32:38,101 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:38,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1263214173, now seen corresponding path program 1 times [2022-11-03 03:32:38,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:32:38,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953249342] [2022-11-03 03:32:38,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:38,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:32:38,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:32:38,104 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:32:38,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:32:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:38,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:32:38,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:38,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:45,000 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:32:45,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953249342] [2022-11-03 03:32:45,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953249342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:45,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [829352490] [2022-11-03 03:32:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:45,001 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:32:45,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:32:45,005 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:32:45,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 03:32:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:45,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:32:45,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:45,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:42,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [829352490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:42,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114512543] [2022-11-03 03:33:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:42,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:42,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:42,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:42,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:33:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:43,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:33:43,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:44,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:08,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114512543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:08,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:34:08,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 37 [2022-11-03 03:34:08,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292894979] [2022-11-03 03:34:08,775 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:08,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 03:34:08,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:34:08,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 03:34:08,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1087, Unknown=35, NotChecked=0, Total=1332 [2022-11-03 03:34:08,777 INFO L87 Difference]: Start difference. First operand 108 states and 145 transitions. Second operand has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 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 03:34:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:10,343 INFO L93 Difference]: Finished difference Result 174 states and 237 transitions. [2022-11-03 03:34:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:34:10,344 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:34:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:10,345 INFO L225 Difference]: With dead ends: 174 [2022-11-03 03:34:10,345 INFO L226 Difference]: Without dead ends: 172 [2022-11-03 03:34:10,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 175 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 88.2s TimeCoverageRelationStatistics Valid=400, Invalid=1727, Unknown=35, NotChecked=0, Total=2162 [2022-11-03 03:34:10,347 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 123 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:10,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 703 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 38 Unchecked, 0.0s Time] [2022-11-03 03:34:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-03 03:34:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-11-03 03:34:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.368421052631579) internal successors, (234), 171 states have internal predecessors, (234), 0 states have call successors, (0), 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 03:34:10,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 234 transitions. [2022-11-03 03:34:10,366 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 234 transitions. Word has length 36 [2022-11-03 03:34:10,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:10,366 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 234 transitions. [2022-11-03 03:34:10,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 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 03:34:10,367 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 234 transitions. [2022-11-03 03:34:10,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:34:10,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:10,369 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:10,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:10,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:10,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:10,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:34:10,993 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:10,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:10,994 INFO L85 PathProgramCache]: Analyzing trace with hash -583155803, now seen corresponding path program 1 times [2022-11-03 03:34:10,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:34:10,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87524734] [2022-11-03 03:34:10,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:10,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:34:10,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:34:10,998 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:34:10,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:34:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:11,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:34:11,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:12,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:14,471 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:14,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87524734] [2022-11-03 03:34:14,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87524734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:14,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1222421791] [2022-11-03 03:34:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:14,472 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:34:14,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:34:14,474 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:34:14,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 03:34:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:14,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:34:14,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:15,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:15,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:16,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1222421791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:16,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412200341] [2022-11-03 03:35:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:16,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:16,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:16,343 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:16,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 03:35:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:16,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:35:16,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:17,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:30,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412200341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:30,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:35:30,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 03:35:30,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863243864] [2022-11-03 03:35:30,226 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:30,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:35:30,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:35:30,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:35:30,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=909, Unknown=33, NotChecked=0, Total=1122 [2022-11-03 03:35:30,229 INFO L87 Difference]: Start difference. First operand 172 states and 234 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 03:35:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:31,571 INFO L93 Difference]: Finished difference Result 310 states and 426 transitions. [2022-11-03 03:35:31,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:35:31,573 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:35:31,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:31,575 INFO L225 Difference]: With dead ends: 310 [2022-11-03 03:35:31,575 INFO L226 Difference]: Without dead ends: 308 [2022-11-03 03:35:31,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 76.0s TimeCoverageRelationStatistics Valid=361, Invalid=1498, Unknown=33, NotChecked=0, Total=1892 [2022-11-03 03:35:31,578 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 182 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:31,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 652 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 50 Unchecked, 0.0s Time] [2022-11-03 03:35:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-03 03:35:31,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-11-03 03:35:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.3778501628664495) internal successors, (423), 307 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:31,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 423 transitions. [2022-11-03 03:35:31,610 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 423 transitions. Word has length 36 [2022-11-03 03:35:31,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:31,611 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 423 transitions. [2022-11-03 03:35:31,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 03:35:31,611 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 423 transitions. [2022-11-03 03:35:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:35:31,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:31,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:31,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:31,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:32,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:32,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:32,219 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:32,220 INFO L85 PathProgramCache]: Analyzing trace with hash -562149595, now seen corresponding path program 1 times [2022-11-03 03:35:32,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:35:32,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60237569] [2022-11-03 03:35:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:32,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:35:32,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:35:32,222 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:35:32,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:35:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:32,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:35:32,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:33,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:37,842 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:35:37,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60237569] [2022-11-03 03:35:37,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60237569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:37,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1386927865] [2022-11-03 03:35:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:37,843 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:35:37,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:35:37,844 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:35:37,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 03:35:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:38,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:35:38,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:38,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:36:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:36:37,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1386927865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:36:37,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401586661] [2022-11-03 03:36:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:36:37,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:36:37,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:36:37,579 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:36:37,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 03:36:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:36:37,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:36:37,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:36:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:36:39,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:37:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:09,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401586661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:37:09,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:37:09,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 37 [2022-11-03 03:37:09,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061205542] [2022-11-03 03:37:09,120 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:37:09,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 03:37:09,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:37:09,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 03:37:09,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1085, Unknown=37, NotChecked=0, Total=1332 [2022-11-03 03:37:09,123 INFO L87 Difference]: Start difference. First operand 308 states and 423 transitions. Second operand has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 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 03:37:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:11,646 INFO L93 Difference]: Finished difference Result 374 states and 515 transitions. [2022-11-03 03:37:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:37:11,647 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:37:11,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:11,649 INFO L225 Difference]: With dead ends: 374 [2022-11-03 03:37:11,650 INFO L226 Difference]: Without dead ends: 372 [2022-11-03 03:37:11,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 176 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 94.7s TimeCoverageRelationStatistics Valid=400, Invalid=1725, Unknown=37, NotChecked=0, Total=2162 [2022-11-03 03:37:11,652 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 153 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:11,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 712 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 64 Unchecked, 0.0s Time] [2022-11-03 03:37:11,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-11-03 03:37:11,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2022-11-03 03:37:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 1.3800539083557952) internal successors, (512), 371 states have internal predecessors, (512), 0 states have call successors, (0), 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 03:37:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 512 transitions. [2022-11-03 03:37:11,694 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 512 transitions. Word has length 36 [2022-11-03 03:37:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:11,695 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 512 transitions. [2022-11-03 03:37:11,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.135135135135135) internal successors, (153), 37 states have internal predecessors, (153), 0 states have call successors, (0), 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 03:37:11,696 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 512 transitions. [2022-11-03 03:37:11,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:37:11,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:11,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:37:11,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:11,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:12,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:12,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:37:12,305 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:12,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:12,305 INFO L85 PathProgramCache]: Analyzing trace with hash 117908775, now seen corresponding path program 1 times [2022-11-03 03:37:12,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:37:12,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214877668] [2022-11-03 03:37:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:12,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:37:12,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:37:12,308 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:37:12,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:37:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:37:12,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:14,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:37:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:25,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:37:25,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214877668] [2022-11-03 03:37:25,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214877668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:37:25,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [167883051] [2022-11-03 03:37:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:25,027 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:37:25,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:37:25,029 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:37:25,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 03:37:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:25,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:37:25,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:37:26,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:27,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [167883051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:27,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472954537] [2022-11-03 03:38:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:27,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:38:27,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:38:27,720 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:38:27,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 03:38:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:27,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:38:27,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:29,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:40,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472954537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:40,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:38:40,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 03:38:40,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451043849] [2022-11-03 03:38:40,532 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:38:40,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:38:40,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:38:40,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:38:40,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=908, Unknown=35, NotChecked=0, Total=1122 [2022-11-03 03:38:40,534 INFO L87 Difference]: Start difference. First operand 372 states and 512 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 03:38:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:41,937 INFO L93 Difference]: Finished difference Result 642 states and 886 transitions. [2022-11-03 03:38:41,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:38:41,938 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:38:41,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:41,940 INFO L225 Difference]: With dead ends: 642 [2022-11-03 03:38:41,940 INFO L226 Difference]: Without dead ends: 640 [2022-11-03 03:38:41,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 83.8s TimeCoverageRelationStatistics Valid=364, Invalid=1493, Unknown=35, NotChecked=0, Total=1892 [2022-11-03 03:38:41,942 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 281 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:41,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 700 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-11-03 03:38:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-11-03 03:38:41,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 640. [2022-11-03 03:38:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.381846635367762) internal successors, (883), 639 states have internal predecessors, (883), 0 states have call successors, (0), 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 03:38:41,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 883 transitions. [2022-11-03 03:38:41,983 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 883 transitions. Word has length 36 [2022-11-03 03:38:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:41,983 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 883 transitions. [2022-11-03 03:38:41,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 03:38:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 883 transitions. [2022-11-03 03:38:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:38:41,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:41,985 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:42,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-03 03:38:42,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:42,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 03:38:42,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:38:42,601 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:42,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2022867751, now seen corresponding path program 1 times [2022-11-03 03:38:42,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:38:42,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870214742] [2022-11-03 03:38:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:42,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:38:42,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:38:42,603 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:38:42,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:38:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:42,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:38:42,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:44,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:49,533 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:38:49,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870214742] [2022-11-03 03:38:49,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870214742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:49,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [211746264] [2022-11-03 03:38:49,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:49,533 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:38:49,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:38:49,534 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:38:49,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 03:38:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:49,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:38:49,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:50,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:44,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [211746264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:39:44,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450748480] [2022-11-03 03:39:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:44,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:44,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:44,201 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:39:44,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 03:39:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:39:44,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:46,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:53,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450748480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:39:53,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:39:53,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 03:39:53,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543941149] [2022-11-03 03:39:53,690 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:39:53,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:39:53,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:39:53,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:39:53,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=914, Unknown=28, NotChecked=0, Total=1122 [2022-11-03 03:39:53,692 INFO L87 Difference]: Start difference. First operand 640 states and 883 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 03:39:55,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:55,306 INFO L93 Difference]: Finished difference Result 778 states and 1075 transitions. [2022-11-03 03:39:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:39:55,309 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:39:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:55,312 INFO L225 Difference]: With dead ends: 778 [2022-11-03 03:39:55,312 INFO L226 Difference]: Without dead ends: 776 [2022-11-03 03:39:55,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 67.4s TimeCoverageRelationStatistics Valid=365, Invalid=1499, Unknown=28, NotChecked=0, Total=1892 [2022-11-03 03:39:55,314 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 308 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:55,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 719 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 34 Unchecked, 0.0s Time] [2022-11-03 03:39:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-11-03 03:39:55,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2022-11-03 03:39:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 1.383225806451613) internal successors, (1072), 775 states have internal predecessors, (1072), 0 states have call successors, (0), 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 03:39:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1072 transitions. [2022-11-03 03:39:55,371 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1072 transitions. Word has length 36 [2022-11-03 03:39:55,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:55,371 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1072 transitions. [2022-11-03 03:39:55,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 03:39:55,372 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1072 transitions. [2022-11-03 03:39:55,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:39:55,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:55,373 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:55,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:55,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:55,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:55,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:39:55,989 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:55,990 INFO L85 PathProgramCache]: Analyzing trace with hash 2043873959, now seen corresponding path program 1 times [2022-11-03 03:39:55,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:39:55,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903387362] [2022-11-03 03:39:55,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:55,991 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:39:55,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:39:55,992 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:39:55,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 03:39:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:56,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:39:56,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:57,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:05,509 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:40:05,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903387362] [2022-11-03 03:40:05,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903387362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:05,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1082672724] [2022-11-03 03:40:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:05,510 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:40:05,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:40:05,512 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:40:05,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 03:40:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:05,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:40:05,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:06,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:55,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1082672724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:55,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029110505] [2022-11-03 03:40:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:55,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:55,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:55,876 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:40:55,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 03:40:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:56,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:40:56,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:58,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:13,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029110505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:13,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:41:13,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 11] total 36 [2022-11-03 03:41:13,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818429551] [2022-11-03 03:41:13,534 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:41:13,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:41:13,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:41:13,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:41:13,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1037, Unknown=26, NotChecked=0, Total=1260 [2022-11-03 03:41:13,537 INFO L87 Difference]: Start difference. First operand 776 states and 1072 transitions. Second operand has 36 states, 36 states have (on average 4.222222222222222) internal successors, (152), 36 states have internal predecessors, (152), 0 states have call successors, (0), 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 03:41:16,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:16,177 INFO L93 Difference]: Finished difference Result 842 states and 1164 transitions. [2022-11-03 03:41:16,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:41:16,178 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.222222222222222) internal successors, (152), 36 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:41:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:16,184 INFO L225 Difference]: With dead ends: 842 [2022-11-03 03:41:16,184 INFO L226 Difference]: Without dead ends: 840 [2022-11-03 03:41:16,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 174 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 74.2s TimeCoverageRelationStatistics Valid=381, Invalid=1663, Unknown=26, NotChecked=0, Total=2070 [2022-11-03 03:41:16,187 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 171 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:16,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 601 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-11-03 03:41:16,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-11-03 03:41:16,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 840. [2022-11-03 03:41:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 1.3837902264600714) internal successors, (1161), 839 states have internal predecessors, (1161), 0 states have call successors, (0), 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 03:41:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1161 transitions. [2022-11-03 03:41:16,272 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1161 transitions. Word has length 36 [2022-11-03 03:41:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:16,272 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 1161 transitions. [2022-11-03 03:41:16,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.222222222222222) internal successors, (152), 36 states have internal predecessors, (152), 0 states have call successors, (0), 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 03:41:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1161 transitions. [2022-11-03 03:41:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:41:16,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:16,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:16,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:16,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:16,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:16,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:41:16,891 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:41:16,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:16,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1571034967, now seen corresponding path program 1 times [2022-11-03 03:41:16,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:41:16,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906314142] [2022-11-03 03:41:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:16,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:41:16,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:41:16,894 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:41:16,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 03:41:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:17,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:41:17,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:18,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:27,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:41:27,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906314142] [2022-11-03 03:41:27,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906314142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:27,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1554936545] [2022-11-03 03:41:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:27,417 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:41:27,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:41:27,418 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:41:27,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 03:41:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:27,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:41:27,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:28,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:28,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:24,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1554936545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:24,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51775443] [2022-11-03 03:42:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:24,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:42:24,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:42:24,285 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:42:24,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-03 03:42:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:24,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:42:24,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:26,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:35,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51775443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:35,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:42:35,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 03:42:35,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264364045] [2022-11-03 03:42:35,486 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:42:35,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:42:35,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:42:35,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:42:35,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=909, Unknown=30, NotChecked=0, Total=1122 [2022-11-03 03:42:35,488 INFO L87 Difference]: Start difference. First operand 840 states and 1161 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 03:42:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:42:37,255 INFO L93 Difference]: Finished difference Result 1358 states and 1880 transitions. [2022-11-03 03:42:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:42:37,256 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:42:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:42:37,261 INFO L225 Difference]: With dead ends: 1358 [2022-11-03 03:42:37,261 INFO L226 Difference]: Without dead ends: 1356 [2022-11-03 03:42:37,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 74.1s TimeCoverageRelationStatistics Valid=368, Invalid=1494, Unknown=30, NotChecked=0, Total=1892 [2022-11-03 03:42:37,264 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 421 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:42:37,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 735 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 37 Unchecked, 0.0s Time] [2022-11-03 03:42:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2022-11-03 03:42:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 1356. [2022-11-03 03:42:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 1.3852398523985239) internal successors, (1877), 1355 states have internal predecessors, (1877), 0 states have call successors, (0), 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 03:42:37,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 1877 transitions. [2022-11-03 03:42:37,412 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 1877 transitions. Word has length 36 [2022-11-03 03:42:37,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:42:37,413 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 1877 transitions. [2022-11-03 03:42:37,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 03:42:37,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 1877 transitions. [2022-11-03 03:42:37,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:42:37,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:37,416 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:42:37,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:37,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:37,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:38,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:42:38,035 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:42:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:38,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1135584427, now seen corresponding path program 1 times [2022-11-03 03:42:38,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:42:38,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137404195] [2022-11-03 03:42:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:38,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:42:38,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:42:38,038 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:42:38,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-03 03:42:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:38,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:42:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:40,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:44,746 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:42:44,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137404195] [2022-11-03 03:42:44,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137404195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:44,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [243222061] [2022-11-03 03:42:44,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:44,747 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:42:44,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:42:44,748 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:42:44,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-03 03:42:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:45,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 03:42:45,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:46,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:43:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:46,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [243222061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:43:46,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088319438] [2022-11-03 03:43:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:46,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:43:46,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:46,995 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:43:46,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-03 03:43:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:47,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-03 03:43:47,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:43:49,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:43:49,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:31,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088319438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:31,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:44:31,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 03:44:31,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164912677] [2022-11-03 03:44:31,595 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:44:31,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:44:31,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:31,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:44:31,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=901, Unknown=44, NotChecked=0, Total=1122 [2022-11-03 03:44:31,597 INFO L87 Difference]: Start difference. First operand 1356 states and 1877 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:33,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:33,643 INFO L93 Difference]: Finished difference Result 1418 states and 1963 transitions. [2022-11-03 03:44:33,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:44:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:44:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:33,650 INFO L225 Difference]: With dead ends: 1418 [2022-11-03 03:44:33,650 INFO L226 Difference]: Without dead ends: 1416 [2022-11-03 03:44:33,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 108.9s TimeCoverageRelationStatistics Valid=314, Invalid=1364, Unknown=44, NotChecked=0, Total=1722 [2022-11-03 03:44:33,652 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 282 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:33,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 911 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2022-11-03 03:44:33,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-11-03 03:44:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 720. [2022-11-03 03:44:33,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 1.383866481223922) internal successors, (995), 719 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 995 transitions. [2022-11-03 03:44:33,747 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 995 transitions. Word has length 36 [2022-11-03 03:44:33,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:33,747 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 995 transitions. [2022-11-03 03:44:33,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 995 transitions. [2022-11-03 03:44:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:44:33,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:33,750 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:33,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:33,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:34,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:34,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:34,369 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:34,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:34,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1179983447, now seen corresponding path program 1 times [2022-11-03 03:44:34,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:34,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610991711] [2022-11-03 03:44:34,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:34,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:34,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:34,372 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:34,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 03:44:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:34,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:44:34,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:35,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:37,150 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:37,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610991711] [2022-11-03 03:44:37,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610991711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:37,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [491471671] [2022-11-03 03:44:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:37,151 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:37,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:44:37,152 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:44:37,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 03:44:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:37,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:44:37,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:38,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:38,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [491471671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:38,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809652109] [2022-11-03 03:44:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:38,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:44:38,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:44:38,732 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:44:38,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 03:44:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:38,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 03:44:38,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:39,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:40,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809652109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:40,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:44:40,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2022-11-03 03:44:40,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574643992] [2022-11-03 03:44:40,040 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:44:40,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 03:44:40,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:44:40,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 03:44:40,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:44:40,042 INFO L87 Difference]: Start difference. First operand 720 states and 995 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:43,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:43,572 INFO L93 Difference]: Finished difference Result 1302 states and 1764 transitions. [2022-11-03 03:44:43,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 03:44:43,573 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:44:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:43,578 INFO L225 Difference]: With dead ends: 1302 [2022-11-03 03:44:43,579 INFO L226 Difference]: Without dead ends: 1273 [2022-11-03 03:44:43,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 03:44:43,580 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 362 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:43,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 796 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 250 Invalid, 0 Unknown, 405 Unchecked, 1.2s Time] [2022-11-03 03:44:43,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-11-03 03:44:43,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 738. [2022-11-03 03:44:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 1.3826322930800543) internal successors, (1019), 737 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1019 transitions. [2022-11-03 03:44:43,684 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1019 transitions. Word has length 36 [2022-11-03 03:44:43,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:43,685 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 1019 transitions. [2022-11-03 03:44:43,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:44:43,685 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1019 transitions. [2022-11-03 03:44:43,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:44:43,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:43,686 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:43,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:43,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:44,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:44,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:44:44,291 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:44,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:44,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1122665563, now seen corresponding path program 1 times [2022-11-03 03:44:44,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:44:44,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087661274] [2022-11-03 03:44:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:44,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:44:44,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:44:44,294 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:44:44,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 03:44:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:44,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:44:44,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:45,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:44:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:54,086 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:44:54,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087661274] [2022-11-03 03:44:54,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087661274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:44:54,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [245865468] [2022-11-03 03:44:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:54,087 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:44:54,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:44:54,088 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:44:54,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 03:44:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:54,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 03:44:54,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:44:55,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:45:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:54,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [245865468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:45:54,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19311975] [2022-11-03 03:45:54,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:54,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:54,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:54,713 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:45:54,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-03 03:45:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:54,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 03:45:54,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:45:56,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:46:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:46:40,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19311975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:46:40,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:46:40,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2022-11-03 03:46:40,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124090680] [2022-11-03 03:46:40,033 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:46:40,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:46:40,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:46:40,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:46:40,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=901, Unknown=43, NotChecked=0, Total=1122 [2022-11-03 03:46:40,035 INFO L87 Difference]: Start difference. First operand 738 states and 1019 transitions. Second operand has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 03:46:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:41,618 INFO L93 Difference]: Finished difference Result 816 states and 1128 transitions. [2022-11-03 03:46:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:46:41,619 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:46:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:41,622 INFO L225 Difference]: With dead ends: 816 [2022-11-03 03:46:41,622 INFO L226 Difference]: Without dead ends: 814 [2022-11-03 03:46:41,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 177 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 111.5s TimeCoverageRelationStatistics Valid=315, Invalid=1364, Unknown=43, NotChecked=0, Total=1722 [2022-11-03 03:46:41,624 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 226 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:41,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 662 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2022-11-03 03:46:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-11-03 03:46:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 726. [2022-11-03 03:46:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.3820689655172413) internal successors, (1002), 725 states have internal predecessors, (1002), 0 states have call successors, (0), 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 03:46:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1002 transitions. [2022-11-03 03:46:41,715 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1002 transitions. Word has length 36 [2022-11-03 03:46:41,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:41,715 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1002 transitions. [2022-11-03 03:46:41,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.529411764705882) internal successors, (154), 34 states have internal predecessors, (154), 0 states have call successors, (0), 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 03:46:41,716 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1002 transitions. [2022-11-03 03:46:41,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:46:41,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:41,717 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:41,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:41,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:42,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:42,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:46:42,323 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:42,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:42,323 INFO L85 PathProgramCache]: Analyzing trace with hash -442607193, now seen corresponding path program 1 times [2022-11-03 03:46:42,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:46:42,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161298200] [2022-11-03 03:46:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:42,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:46:42,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:46:42,325 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:46:42,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 03:46:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:42,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:46:42,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:46:43,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:46:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:46:56,753 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:46:56,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161298200] [2022-11-03 03:46:56,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161298200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:46:56,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1554082411] [2022-11-03 03:46:56,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:56,754 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:46:56,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:46:56,755 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:46:56,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e149532b-de69-410a-9ac4-e13cdd7553a2/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 03:46:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 03:46:57,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:46:58,036 INFO L328 TraceCheckSpWp]: Computing backward predicates...