./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --- 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-8393723 [2022-11-19 08:21:39,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:21:39,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:21:39,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:21:39,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:21:39,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:21:39,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:21:39,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:21:39,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:21:39,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:21:39,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:21:39,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:21:39,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:21:39,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:21:39,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:21:39,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:21:39,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:21:39,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:21:39,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:21:39,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:21:39,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:21:39,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:21:39,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:21:39,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:21:39,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:21:39,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:21:39,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:21:39,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:21:39,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:21:39,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:21:39,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:21:39,908 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:21:39,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:21:39,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:21:39,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:21:39,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:21:39,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:21:39,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:21:39,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:21:39,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:21:39,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:21:39,916 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:21:39,951 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:21:39,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:21:39,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:21:39,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:21:39,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:21:39,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:21:39,954 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:21:39,954 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:21:39,954 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:21:39,954 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:21:39,956 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:21:39,956 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:21:39,956 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:21:39,956 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:21:39,957 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:21:39,957 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:21:39,957 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:21:39,957 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:21:39,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:21:39,959 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:21:39,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:21:39,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:21:39,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:21:39,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:21:39,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:21:39,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:21:39,962 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:21:39,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:21:39,962 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:21:39,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:21:39,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:21:39,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:21:39,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:21:39,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:21:39,964 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:21:39,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:21:39,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:21:39,965 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:21:39,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:21:39,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:21:39,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:21:39,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 [2022-11-19 08:21:40,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:21:40,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:21:40,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:21:40,268 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:21:40,269 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:21:40,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-11-19 08:21:40,338 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/data/1a62cbb96/90073980153e44aa8c9d77d94de54d6b/FLAG438a91945 [2022-11-19 08:21:40,754 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:21:40,755 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-11-19 08:21:40,766 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/data/1a62cbb96/90073980153e44aa8c9d77d94de54d6b/FLAG438a91945 [2022-11-19 08:21:41,166 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/data/1a62cbb96/90073980153e44aa8c9d77d94de54d6b [2022-11-19 08:21:41,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:21:41,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:21:41,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:21:41,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:21:41,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:21:41,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:21:41" (1/1) ... [2022-11-19 08:21:41,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@679ca925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:21:41, skipping insertion in model container [2022-11-19 08:21:41,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:21:41" (1/1) ... [2022-11-19 08:21:41,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:21:41,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:21:41,392 WARN L234 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_3424e358-89c1-4af7-a326-234b57b6217e/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2022-11-19 08:21:41,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:21:41,446 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:21:41,469 WARN L234 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_3424e358-89c1-4af7-a326-234b57b6217e/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2022-11-19 08:21:41,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:21:41,508 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:21:41,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:21:41 WrapperNode [2022-11-19 08:21:41,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:21:41,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:21:41,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:21:41,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:21:41,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:21:41" (1/1) ... [2022-11-19 08:21:41,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:21:41" (1/1) ... [2022-11-19 08:21:41,561 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-19 08:21:41,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:21:41,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:21:41,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:21:41,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:21:41,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:21:41" (1/1) ... [2022-11-19 08:21:41,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:21:41" (1/1) ... [2022-11-19 08:21:41,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:21:41" (1/1) ... [2022-11-19 08:21:41,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:21:41" (1/1) ... [2022-11-19 08:21:41,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:21:41" (1/1) ... [2022-11-19 08:21:41,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:21:41" (1/1) ... [2022-11-19 08:21:41,603 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:21:41" (1/1) ... [2022-11-19 08:21:41,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:21:41" (1/1) ... [2022-11-19 08:21:41,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:21:41,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:21:41,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:21:41,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:21:41,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:21:41" (1/1) ... [2022-11-19 08:21:41,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:21:41,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:21:41,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:21:41,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:21:41,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:21:41,692 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 08:21:41,693 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 08:21:41,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:21:41,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:21:41,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:21:41,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 08:21:41,693 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 08:21:41,762 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:21:41,764 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:21:41,923 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:21:41,947 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:21:41,947 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 08:21:41,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:21:41 BoogieIcfgContainer [2022-11-19 08:21:41,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:21:41,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:21:41,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:21:41,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:21:41,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:21:41" (1/3) ... [2022-11-19 08:21:41,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f541f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:21:41, skipping insertion in model container [2022-11-19 08:21:41,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:21:41" (2/3) ... [2022-11-19 08:21:41,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f541f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:21:41, skipping insertion in model container [2022-11-19 08:21:41,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:21:41" (3/3) ... [2022-11-19 08:21:41,958 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2022-11-19 08:21:41,976 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:21:41,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:21:42,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:21:42,034 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;@148f2a0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:21:42,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:21:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 08:21:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:21:42,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:42,047 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:21:42,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:42,053 INFO L85 PathProgramCache]: Analyzing trace with hash 966807424, now seen corresponding path program 1 times [2022-11-19 08:21:42,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:42,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671733416] [2022-11-19 08:21:42,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:42,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:42,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:21:42,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24015687] [2022-11-19 08:21:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:42,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:42,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:21:42,167 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:21:42,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:21:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:42,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-19 08:21:42,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:21:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 08:21:42,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:21:42,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:42,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671733416] [2022-11-19 08:21:42,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:21:42,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24015687] [2022-11-19 08:21:42,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24015687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:21:42,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:21:42,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:21:42,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460583084] [2022-11-19 08:21:42,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:21:42,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 08:21:42,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:21:42,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 08:21:42,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:21:42,440 INFO L87 Difference]: Start difference. First operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-19 08:21:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:42,474 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2022-11-19 08:21:42,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 08:21:42,477 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 26 [2022-11-19 08:21:42,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:42,485 INFO L225 Difference]: With dead ends: 49 [2022-11-19 08:21:42,485 INFO L226 Difference]: Without dead ends: 28 [2022-11-19 08:21:42,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:21:42,492 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:42,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:21:42,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-19 08:21:42,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-19 08:21:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 08:21:42,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-11-19 08:21:42,532 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 26 [2022-11-19 08:21:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:42,534 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-11-19 08:21:42,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-19 08:21:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-11-19 08:21:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:21:42,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:42,537 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:21:42,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:21:42,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 08:21:42,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:42,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:42,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1643993843, now seen corresponding path program 1 times [2022-11-19 08:21:42,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:42,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492124812] [2022-11-19 08:21:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:42,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:42,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:21:42,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591701975] [2022-11-19 08:21:42,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:42,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:42,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:21:42,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:21:42,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:21:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:42,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:21:42,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:21:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 08:21:43,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:21:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 08:21:43,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:43,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492124812] [2022-11-19 08:21:43,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:21:43,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591701975] [2022-11-19 08:21:43,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591701975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:21:43,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [893342578] [2022-11-19 08:21:43,203 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 08:21:43,207 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:21:43,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:21:43,218 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:21:43,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:21:44,245 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 08:21:44,272 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:21:45,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [893342578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:21:45,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:21:45,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5] total 14 [2022-11-19 08:21:45,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987141718] [2022-11-19 08:21:45,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:21:45,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:21:45,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:21:45,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:21:45,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:21:45,319 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 08:21:45,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:45,576 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-19 08:21:45,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:21:45,577 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2022-11-19 08:21:45,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:45,579 INFO L225 Difference]: With dead ends: 38 [2022-11-19 08:21:45,580 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 08:21:45,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:21:45,582 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:45,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 48 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:21:45,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 08:21:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-19 08:21:45,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 08:21:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-11-19 08:21:45,601 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 27 [2022-11-19 08:21:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:45,602 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-11-19 08:21:45,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 08:21:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-11-19 08:21:45,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:21:45,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:45,603 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:21:45,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:21:45,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:45,809 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:45,810 INFO L85 PathProgramCache]: Analyzing trace with hash -575116102, now seen corresponding path program 1 times [2022-11-19 08:21:45,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:45,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084511187] [2022-11-19 08:21:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:45,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:45,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:21:45,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228819401] [2022-11-19 08:21:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:45,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:45,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:21:45,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:21:45,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:21:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:45,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:21:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:21:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 08:21:45,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:21:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 08:21:46,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:46,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084511187] [2022-11-19 08:21:46,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:21:46,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228819401] [2022-11-19 08:21:46,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228819401] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:21:46,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:21:46,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-19 08:21:46,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029474754] [2022-11-19 08:21:46,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:21:46,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:21:46,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:21:46,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:21:46,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:21:46,072 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-19 08:21:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:46,154 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-19 08:21:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:21:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 28 [2022-11-19 08:21:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:46,157 INFO L225 Difference]: With dead ends: 36 [2022-11-19 08:21:46,157 INFO L226 Difference]: Without dead ends: 34 [2022-11-19 08:21:46,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:21:46,163 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:46,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:21:46,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-19 08:21:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-19 08:21:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 08:21:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-19 08:21:46,187 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2022-11-19 08:21:46,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:46,187 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-19 08:21:46,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-19 08:21:46,188 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-19 08:21:46,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:21:46,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:46,189 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2022-11-19 08:21:46,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:21:46,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:46,395 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:46,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1810277145, now seen corresponding path program 1 times [2022-11-19 08:21:46,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:46,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18336017] [2022-11-19 08:21:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:46,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:46,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:21:46,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545445687] [2022-11-19 08:21:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:46,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:46,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:21:46,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:21:46,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:21:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:46,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:21:46,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:21:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 08:21:46,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:21:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 08:21:46,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:46,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18336017] [2022-11-19 08:21:46,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:21:46,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545445687] [2022-11-19 08:21:46,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545445687] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:21:46,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:21:46,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2022-11-19 08:21:46,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768670074] [2022-11-19 08:21:46,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:21:46,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:21:46,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:21:46,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:21:46,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:21:46,767 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:21:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:46,848 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-11-19 08:21:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:21:46,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2022-11-19 08:21:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:46,850 INFO L225 Difference]: With dead ends: 47 [2022-11-19 08:21:46,850 INFO L226 Difference]: Without dead ends: 45 [2022-11-19 08:21:46,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:21:46,851 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:46,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:21:46,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-19 08:21:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-11-19 08:21:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 08:21:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 58 transitions. [2022-11-19 08:21:46,875 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 58 transitions. Word has length 33 [2022-11-19 08:21:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:46,875 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 58 transitions. [2022-11-19 08:21:46,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:21:46,876 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 58 transitions. [2022-11-19 08:21:46,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 08:21:46,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:46,877 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 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] [2022-11-19 08:21:46,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:21:47,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:47,089 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:47,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:47,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1313498982, now seen corresponding path program 1 times [2022-11-19 08:21:47,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:47,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499459924] [2022-11-19 08:21:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:47,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:47,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:21:47,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839954389] [2022-11-19 08:21:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:47,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:47,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:21:47,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:21:47,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:21:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:47,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 08:21:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:21:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 08:21:47,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:21:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 08:21:47,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:47,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499459924] [2022-11-19 08:21:47,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:21:47,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839954389] [2022-11-19 08:21:47,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839954389] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:21:47,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:21:47,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 15 [2022-11-19 08:21:47,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628241187] [2022-11-19 08:21:47,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:21:47,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:21:47,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:21:47,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:21:47,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:21:47,715 INFO L87 Difference]: Start difference. First operand 44 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-19 08:21:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:47,834 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2022-11-19 08:21:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:21:47,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 38 [2022-11-19 08:21:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:47,840 INFO L225 Difference]: With dead ends: 51 [2022-11-19 08:21:47,840 INFO L226 Difference]: Without dead ends: 49 [2022-11-19 08:21:47,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:21:47,841 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:47,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 128 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:21:47,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-19 08:21:47,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-11-19 08:21:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 08:21:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-11-19 08:21:47,876 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 38 [2022-11-19 08:21:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:47,878 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-11-19 08:21:47,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-19 08:21:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-11-19 08:21:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 08:21:47,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:47,880 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:21:47,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 08:21:48,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:48,085 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:48,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:48,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1793667961, now seen corresponding path program 1 times [2022-11-19 08:21:48,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:48,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150144813] [2022-11-19 08:21:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:48,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:48,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:21:48,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452440700] [2022-11-19 08:21:48,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:48,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:48,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:21:48,119 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:21:48,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:21:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:48,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 08:21:48,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:21:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 08:21:48,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:21:48,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:48,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150144813] [2022-11-19 08:21:48,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:21:48,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452440700] [2022-11-19 08:21:48,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452440700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:21:48,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211212706] [2022-11-19 08:21:48,617 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-19 08:21:48,617 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:21:48,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:21:48,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:21:48,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:21:49,587 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-19 08:21:49,596 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 08:21:49,612 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:21:51,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1211212706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:21:51,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:21:51,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10] total 22 [2022-11-19 08:21:51,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317254662] [2022-11-19 08:21:51,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:21:51,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:21:51,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:21:51,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:21:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:21:51,515 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-19 08:21:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:21:51,874 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2022-11-19 08:21:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:21:51,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 43 [2022-11-19 08:21:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:21:51,879 INFO L225 Difference]: With dead ends: 73 [2022-11-19 08:21:51,879 INFO L226 Difference]: Without dead ends: 71 [2022-11-19 08:21:51,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:21:51,881 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:21:51,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 50 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:21:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-19 08:21:51,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-11-19 08:21:51,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 9 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-19 08:21:51,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2022-11-19 08:21:51,906 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 43 [2022-11-19 08:21:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:21:51,906 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2022-11-19 08:21:51,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-19 08:21:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2022-11-19 08:21:51,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 08:21:51,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:21:51,908 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:21:51,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 08:21:52,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 08:21:52,113 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:21:52,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:21:52,114 INFO L85 PathProgramCache]: Analyzing trace with hash 434944611, now seen corresponding path program 1 times [2022-11-19 08:21:52,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:21:52,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815446424] [2022-11-19 08:21:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:52,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:21:52,126 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:21:52,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345985580] [2022-11-19 08:21:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:21:52,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:21:52,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:21:52,128 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:21:52,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:21:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:21:52,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:21:52,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:21:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 08:21:52,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:21:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-19 08:21:52,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:21:52,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815446424] [2022-11-19 08:21:52,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:21:52,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345985580] [2022-11-19 08:21:52,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345985580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:21:52,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1229801821] [2022-11-19 08:21:52,334 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-19 08:21:52,334 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:21:52,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:21:52,334 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:21:52,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:22:04,465 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2022-11-19 08:22:04,489 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 08:22:04,502 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:22:09,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2208#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:22:09,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:22:09,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:22:09,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-11-19 08:22:09,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415491880] [2022-11-19 08:22:09,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:22:09,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:22:09,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:09,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:22:09,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:22:09,058 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 08:22:09,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:09,356 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2022-11-19 08:22:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:22:09,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2022-11-19 08:22:09,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:09,358 INFO L225 Difference]: With dead ends: 111 [2022-11-19 08:22:09,358 INFO L226 Difference]: Without dead ends: 103 [2022-11-19 08:22:09,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 118 SyntacticMatches, 14 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:22:09,359 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 34 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:09,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 177 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:22:09,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-19 08:22:09,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2022-11-19 08:22:09,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-19 08:22:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2022-11-19 08:22:09,393 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 52 [2022-11-19 08:22:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:09,394 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2022-11-19 08:22:09,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 08:22:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2022-11-19 08:22:09,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 08:22:09,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:09,395 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:09,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:22:09,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 08:22:09,601 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:09,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:09,601 INFO L85 PathProgramCache]: Analyzing trace with hash -243308457, now seen corresponding path program 1 times [2022-11-19 08:22:09,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:09,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788997533] [2022-11-19 08:22:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:09,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:09,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:22:09,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894684638] [2022-11-19 08:22:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:09,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:09,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:22:09,630 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:22:09,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:22:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:09,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:22:09,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:22:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-19 08:22:09,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:22:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 08:22:09,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:09,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788997533] [2022-11-19 08:22:09,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:22:09,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894684638] [2022-11-19 08:22:09,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894684638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:22:09,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1653048166] [2022-11-19 08:22:09,995 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 08:22:09,996 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:22:09,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:22:09,997 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:22:09,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:22:20,197 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-19 08:22:20,205 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 08:22:20,217 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:22:25,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1653048166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:22:25,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:22:25,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [9, 7] total 28 [2022-11-19 08:22:25,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986301125] [2022-11-19 08:22:25,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:22:25,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 08:22:25,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:25,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 08:22:25,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:22:25,004 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 08:22:26,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:26,620 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2022-11-19 08:22:26,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 08:22:26,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 58 [2022-11-19 08:22:26,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:26,622 INFO L225 Difference]: With dead ends: 113 [2022-11-19 08:22:26,622 INFO L226 Difference]: Without dead ends: 111 [2022-11-19 08:22:26,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 130 SyntacticMatches, 16 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-11-19 08:22:26,624 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:26,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 59 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:22:26,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-19 08:22:26,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-11-19 08:22:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 36 states have call successors, (36), 11 states have call predecessors, (36), 11 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-19 08:22:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2022-11-19 08:22:26,660 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 58 [2022-11-19 08:22:26,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:26,661 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2022-11-19 08:22:26,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 08:22:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2022-11-19 08:22:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 08:22:26,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:26,662 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:26,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:22:26,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:26,864 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:26,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1984692712, now seen corresponding path program 1 times [2022-11-19 08:22:26,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:26,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022099052] [2022-11-19 08:22:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:26,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:26,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:22:26,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469329074] [2022-11-19 08:22:26,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:26,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:26,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:22:26,877 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:22:26,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:22:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:26,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:22:26,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:22:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-19 08:22:27,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:22:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-19 08:22:27,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:27,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022099052] [2022-11-19 08:22:27,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:22:27,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469329074] [2022-11-19 08:22:27,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469329074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:22:27,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1051451673] [2022-11-19 08:22:27,171 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-19 08:22:27,171 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:22:27,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:22:27,172 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:22:27,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:22:31,623 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2022-11-19 08:22:31,672 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 08:22:31,684 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:22:37,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3661#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:22:37,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:22:37,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:22:37,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-19 08:22:37,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186059661] [2022-11-19 08:22:37,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:22:37,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:22:37,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:37,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:22:37,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-11-19 08:22:37,433 INFO L87 Difference]: Start difference. First operand 111 states and 144 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 08:22:37,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:37,715 INFO L93 Difference]: Finished difference Result 122 states and 158 transitions. [2022-11-19 08:22:37,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:22:37,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 65 [2022-11-19 08:22:37,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:37,719 INFO L225 Difference]: With dead ends: 122 [2022-11-19 08:22:37,719 INFO L226 Difference]: Without dead ends: 120 [2022-11-19 08:22:37,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 157 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-11-19 08:22:37,721 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:37,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 74 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:22:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-19 08:22:37,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-11-19 08:22:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 69 states have internal predecessors, (77), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-19 08:22:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2022-11-19 08:22:37,768 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 65 [2022-11-19 08:22:37,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:37,769 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2022-11-19 08:22:37,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 08:22:37,769 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2022-11-19 08:22:37,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 08:22:37,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:37,771 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:37,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:22:37,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:37,983 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:37,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:37,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2003369438, now seen corresponding path program 1 times [2022-11-19 08:22:37,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:37,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331339072] [2022-11-19 08:22:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:37,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:37,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:22:37,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411063137] [2022-11-19 08:22:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:37,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:22:37,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:22:37,998 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:22:37,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:22:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:38,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 08:22:38,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:22:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-19 08:22:38,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:22:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 08:22:39,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:39,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331339072] [2022-11-19 08:22:39,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:22:39,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411063137] [2022-11-19 08:22:39,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411063137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:22:39,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2119482402] [2022-11-19 08:22:39,332 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-19 08:22:39,332 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:22:39,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:22:39,332 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:22:39,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:22:42,818 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-19 08:22:42,821 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 08:22:42,832 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:23:01,313 WARN L233 SmtUtils]: Spent 10.60s on a formula simplification. DAG size of input: 83 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:23:23,105 WARN L233 SmtUtils]: Spent 20.37s on a formula simplification. DAG size of input: 85 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:23:23,450 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4513#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:23:23,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:23:23,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:23:23,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-11-19 08:23:23,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016360202] [2022-11-19 08:23:23,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:23:23,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:23:23,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:23,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:23:23,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 08:23:23,453 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-19 08:23:37,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:37,325 INFO L93 Difference]: Finished difference Result 199 states and 279 transitions. [2022-11-19 08:23:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 08:23:37,325 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 74 [2022-11-19 08:23:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:37,328 INFO L225 Difference]: With dead ends: 199 [2022-11-19 08:23:37,329 INFO L226 Difference]: Without dead ends: 197 [2022-11-19 08:23:37,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 179 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 47.5s TimeCoverageRelationStatistics Valid=437, Invalid=3103, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 08:23:37,331 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 111 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:37,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 375 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-19 08:23:37,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-19 08:23:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2022-11-19 08:23:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 101 states have internal predecessors, (121), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 71 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-19 08:23:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 266 transitions. [2022-11-19 08:23:37,422 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 266 transitions. Word has length 74 [2022-11-19 08:23:37,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:37,422 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 266 transitions. [2022-11-19 08:23:37,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-19 08:23:37,423 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 266 transitions. [2022-11-19 08:23:37,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-19 08:23:37,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:37,424 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:37,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:23:37,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:23:37,636 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:37,637 INFO L85 PathProgramCache]: Analyzing trace with hash -134461569, now seen corresponding path program 1 times [2022-11-19 08:23:37,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:37,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967667318] [2022-11-19 08:23:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:37,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:37,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:23:37,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813179181] [2022-11-19 08:23:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:37,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:37,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:37,648 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:37,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:23:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:37,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:23:37,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 39 proven. 16 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-19 08:23:38,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:23:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-19 08:23:38,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:38,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967667318] [2022-11-19 08:23:38,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:23:38,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813179181] [2022-11-19 08:23:38,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813179181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:23:38,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [163856793] [2022-11-19 08:23:38,748 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-19 08:23:38,748 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:23:38,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:23:38,749 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:23:38,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:23:42,244 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-19 08:23:42,247 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 08:23:42,260 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:24:12,521 WARN L233 SmtUtils]: Spent 26.49s on a formula simplification. DAG size of input: 180 DAG size of output: 147 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:24:37,874 WARN L233 SmtUtils]: Spent 17.08s on a formula simplification. DAG size of input: 77 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:24:54,004 WARN L233 SmtUtils]: Spent 13.47s on a formula simplification. DAG size of input: 178 DAG size of output: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:24:54,431 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5672#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:24:54,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:24:54,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:24:54,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2022-11-19 08:24:54,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844470172] [2022-11-19 08:24:54,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:24:54,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 08:24:54,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:24:54,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 08:24:54,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1363, Unknown=1, NotChecked=0, Total=1560 [2022-11-19 08:24:54,434 INFO L87 Difference]: Start difference. First operand 187 states and 266 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-19 08:25:00,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:00,237 INFO L93 Difference]: Finished difference Result 231 states and 326 transitions. [2022-11-19 08:25:00,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 08:25:00,238 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 79 [2022-11-19 08:25:00,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:00,240 INFO L225 Difference]: With dead ends: 231 [2022-11-19 08:25:00,240 INFO L226 Difference]: Without dead ends: 225 [2022-11-19 08:25:00,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 191 SyntacticMatches, 11 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 76.4s TimeCoverageRelationStatistics Valid=332, Invalid=2319, Unknown=1, NotChecked=0, Total=2652 [2022-11-19 08:25:00,243 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 74 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:00,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 147 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-19 08:25:00,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-19 08:25:00,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 197. [2022-11-19 08:25:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 109 states have internal predecessors, (127), 71 states have call successors, (71), 17 states have call predecessors, (71), 17 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-19 08:25:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 268 transitions. [2022-11-19 08:25:00,345 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 268 transitions. Word has length 79 [2022-11-19 08:25:00,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:00,346 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 268 transitions. [2022-11-19 08:25:00,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 15 states have internal predecessors, (36), 9 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-19 08:25:00,346 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 268 transitions. [2022-11-19 08:25:00,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-19 08:25:00,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:00,348 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:00,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 08:25:00,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 08:25:00,555 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:25:00,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:00,556 INFO L85 PathProgramCache]: Analyzing trace with hash 145896886, now seen corresponding path program 1 times [2022-11-19 08:25:00,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:00,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433511890] [2022-11-19 08:25:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:00,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:00,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:25:00,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259077337] [2022-11-19 08:25:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:00,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:00,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:00,573 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:25:00,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:25:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:00,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-19 08:25:00,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:25:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 81 proven. 36 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-11-19 08:25:01,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:25:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 79 proven. 33 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-11-19 08:25:15,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:15,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433511890] [2022-11-19 08:25:15,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:25:15,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259077337] [2022-11-19 08:25:15,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259077337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:25:15,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549773712] [2022-11-19 08:25:15,150 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 08:25:15,150 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:25:15,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:25:15,151 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:25:15,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:25:18,368 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-19 08:25:18,372 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 08:25:18,386 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:26:01,297 WARN L233 SmtUtils]: Spent 12.67s on a formula simplification. DAG size of input: 77 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:26:26,732 WARN L233 SmtUtils]: Spent 18.76s on a formula simplification. DAG size of input: 79 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:26:27,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6954#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:26:27,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:26:27,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:26:27,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2022-11-19 08:26:27,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451964177] [2022-11-19 08:26:27,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:26:27,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 08:26:27,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:27,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 08:26:27,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1493, Unknown=6, NotChecked=0, Total=1722 [2022-11-19 08:26:27,076 INFO L87 Difference]: Start difference. First operand 197 states and 268 transitions. Second operand has 23 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 13 states have call predecessors, (32), 11 states have call successors, (32) [2022-11-19 08:26:29,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:26:31,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:26:34,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:26:38,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:26:40,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:26:42,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:27:40,720 WARN L233 SmtUtils]: Spent 57.53s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:27:42,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:28:02,568 WARN L233 SmtUtils]: Spent 19.47s on a formula simplification. DAG size of input: 65 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:28:06,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:28:10,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:28:12,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:28:14,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:28:16,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:29:12,651 WARN L233 SmtUtils]: Spent 52.36s on a formula simplification. DAG size of input: 74 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:29:18,357 WARN L233 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:29:20,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:29:23,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:29:27,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:04,297 WARN L233 SmtUtils]: Spent 36.35s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:30:06,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:08,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:11,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:13,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:15,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:19,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:22,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:33,119 WARN L233 SmtUtils]: Spent 10.29s on a formula simplification. DAG size of input: 61 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:30:35,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:30:51,138 WARN L233 SmtUtils]: Spent 15.40s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:31:12,589 WARN L233 SmtUtils]: Spent 20.60s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:31:29,072 WARN L233 SmtUtils]: Spent 16.19s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:31:32,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:31:34,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:31:51,815 WARN L233 SmtUtils]: Spent 17.31s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:32:05,604 WARN L233 SmtUtils]: Spent 11.50s on a formula simplification. DAG size of input: 61 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:32:12,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:32:33,303 WARN L233 SmtUtils]: Spent 20.54s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:32:35,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:32:36,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:36,379 INFO L93 Difference]: Finished difference Result 269 states and 373 transitions. [2022-11-19 08:32:36,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-19 08:32:36,380 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 13 states have call predecessors, (32), 11 states have call successors, (32) Word has length 90 [2022-11-19 08:32:36,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:36,382 INFO L225 Difference]: With dead ends: 269 [2022-11-19 08:32:36,382 INFO L226 Difference]: Without dead ends: 267 [2022-11-19 08:32:36,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 213 SyntacticMatches, 15 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 366.6s TimeCoverageRelationStatistics Valid=616, Invalid=3538, Unknown=6, NotChecked=0, Total=4160 [2022-11-19 08:32:36,385 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 133 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 198 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:36,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 137 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1023 Invalid, 25 Unknown, 0 Unchecked, 74.9s Time] [2022-11-19 08:32:36,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-19 08:32:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 260. [2022-11-19 08:32:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 141 states have (on average 1.1843971631205674) internal successors, (167), 144 states have internal predecessors, (167), 99 states have call successors, (99), 19 states have call predecessors, (99), 19 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-19 08:32:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 364 transitions. [2022-11-19 08:32:36,722 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 364 transitions. Word has length 90 [2022-11-19 08:32:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:36,722 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 364 transitions. [2022-11-19 08:32:36,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 13 states have call predecessors, (32), 11 states have call successors, (32) [2022-11-19 08:32:36,723 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 364 transitions. [2022-11-19 08:32:36,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-19 08:32:36,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:36,724 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:36,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-19 08:32:36,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:36,932 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:32:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:36,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2106799636, now seen corresponding path program 2 times [2022-11-19 08:32:36,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:36,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891971643] [2022-11-19 08:32:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:36,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:36,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:32:36,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79365609] [2022-11-19 08:32:36,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:32:36,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:36,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:36,947 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:36,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:32:37,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:32:37,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:32:37,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:32:37,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-11-19 08:32:37,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:32:37,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:37,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891971643] [2022-11-19 08:32:37,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:32:37,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79365609] [2022-11-19 08:32:37,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79365609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:32:37,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:32:37,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:32:37,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010227152] [2022-11-19 08:32:37,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:32:37,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:32:37,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:37,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:32:37,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:32:37,066 INFO L87 Difference]: Start difference. First operand 260 states and 364 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:32:37,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:37,331 INFO L93 Difference]: Finished difference Result 368 states and 512 transitions. [2022-11-19 08:32:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:32:37,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 99 [2022-11-19 08:32:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:37,334 INFO L225 Difference]: With dead ends: 368 [2022-11-19 08:32:37,334 INFO L226 Difference]: Without dead ends: 235 [2022-11-19 08:32:37,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:32:37,336 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:37,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 128 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:32:37,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-19 08:32:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 218. [2022-11-19 08:32:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 119 states have (on average 1.134453781512605) internal successors, (135), 122 states have internal predecessors, (135), 79 states have call successors, (79), 19 states have call predecessors, (79), 19 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-19 08:32:37,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 292 transitions. [2022-11-19 08:32:37,479 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 292 transitions. Word has length 99 [2022-11-19 08:32:37,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:37,480 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 292 transitions. [2022-11-19 08:32:37,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-19 08:32:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 292 transitions. [2022-11-19 08:32:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 08:32:37,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:37,482 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:37,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:37,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:37,683 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:32:37,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:37,683 INFO L85 PathProgramCache]: Analyzing trace with hash -425141716, now seen corresponding path program 2 times [2022-11-19 08:32:37,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:37,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566298262] [2022-11-19 08:32:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:37,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:37,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:32:37,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78178634] [2022-11-19 08:32:37,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:32:37,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:37,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:37,697 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:37,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:32:37,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:32:37,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:32:37,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 08:32:37,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 33 proven. 32 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2022-11-19 08:32:38,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:32:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-11-19 08:32:39,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:39,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566298262] [2022-11-19 08:32:39,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:32:39,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78178634] [2022-11-19 08:32:39,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78178634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:32:39,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1256890855] [2022-11-19 08:32:39,365 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 08:32:39,365 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:32:39,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:32:39,366 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:32:39,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:32:42,519 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2022-11-19 08:32:42,558 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 08:32:42,572 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:33:18,899 WARN L233 SmtUtils]: Spent 27.72s on a formula simplification. DAG size of input: 176 DAG size of output: 147 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:33:35,540 WARN L233 SmtUtils]: Spent 11.72s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:33:48,373 WARN L233 SmtUtils]: Spent 10.88s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:33:48,522 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9742#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:33:48,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:33:48,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:33:48,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2022-11-19 08:33:48,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168065762] [2022-11-19 08:33:48,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:33:48,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 08:33:48,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:33:48,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 08:33:48,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 08:33:48,526 INFO L87 Difference]: Start difference. First operand 218 states and 292 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-11-19 08:34:15,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:34:15,615 INFO L93 Difference]: Finished difference Result 339 states and 479 transitions. [2022-11-19 08:34:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 08:34:15,616 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 107 [2022-11-19 08:34:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:34:15,620 INFO L225 Difference]: With dead ends: 339 [2022-11-19 08:34:15,620 INFO L226 Difference]: Without dead ends: 337 [2022-11-19 08:34:15,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 267 SyntacticMatches, 16 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 80.5s TimeCoverageRelationStatistics Valid=546, Invalid=3359, Unknown=1, NotChecked=0, Total=3906 [2022-11-19 08:34:15,622 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 86 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:34:15,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 369 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2022-11-19 08:34:15,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-19 08:34:15,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 301. [2022-11-19 08:34:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 159 states have (on average 1.1635220125786163) internal successors, (185), 163 states have internal predecessors, (185), 119 states have call successors, (119), 22 states have call predecessors, (119), 22 states have return successors, (118), 115 states have call predecessors, (118), 118 states have call successors, (118) [2022-11-19 08:34:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 422 transitions. [2022-11-19 08:34:15,959 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 422 transitions. Word has length 107 [2022-11-19 08:34:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:34:15,960 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 422 transitions. [2022-11-19 08:34:15,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-11-19 08:34:15,960 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 422 transitions. [2022-11-19 08:34:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-19 08:34:15,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:34:15,963 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:34:15,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:34:16,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 08:34:16,170 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:34:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:34:16,171 INFO L85 PathProgramCache]: Analyzing trace with hash -743497349, now seen corresponding path program 3 times [2022-11-19 08:34:16,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:34:16,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770324663] [2022-11-19 08:34:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:34:16,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:34:16,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:34:16,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453708169] [2022-11-19 08:34:16,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:34:16,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:34:16,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:16,184 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:34:16,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:34:16,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:34:16,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:34:16,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-19 08:34:16,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:34:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 68 proven. 41 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2022-11-19 08:34:17,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 69 proven. 35 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-11-19 08:34:19,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:19,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770324663] [2022-11-19 08:34:19,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:34:19,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453708169] [2022-11-19 08:34:19,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453708169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:19,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483599108] [2022-11-19 08:34:19,129 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 08:34:19,129 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:19,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:19,130 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:19,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:23,812 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-19 08:34:23,816 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 08:34:23,829 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:45,883 WARN L233 SmtUtils]: Spent 13.63s on a formula simplification. DAG size of input: 83 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:34:54,623 WARN L233 SmtUtils]: Spent 6.85s on a formula simplification. DAG size of input: 85 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:34:56,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11519#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:34:56,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:56,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:34:56,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2022-11-19 08:34:56,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873257269] [2022-11-19 08:34:56,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:56,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 08:34:56,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:56,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 08:34:56,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 08:34:56,976 INFO L87 Difference]: Start difference. First operand 301 states and 422 transitions. Second operand has 28 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 14 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 14 states have call predecessors, (38), 12 states have call successors, (38) [2022-11-19 08:35:00,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:35:05,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:35:10,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:10,541 INFO L93 Difference]: Finished difference Result 372 states and 524 transitions. [2022-11-19 08:35:10,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 08:35:10,542 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 14 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 14 states have call predecessors, (38), 12 states have call successors, (38) Word has length 110 [2022-11-19 08:35:10,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:10,545 INFO L225 Difference]: With dead ends: 372 [2022-11-19 08:35:10,545 INFO L226 Difference]: Without dead ends: 370 [2022-11-19 08:35:10,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 263 SyntacticMatches, 20 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2329 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=616, Invalid=3806, Unknown=0, NotChecked=0, Total=4422 [2022-11-19 08:35:10,547 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 171 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:10,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 150 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-11-19 08:35:10,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-19 08:35:10,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 367. [2022-11-19 08:35:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 193 states have (on average 1.1709844559585492) internal successors, (226), 200 states have internal predecessors, (226), 147 states have call successors, (147), 26 states have call predecessors, (147), 26 states have return successors, (146), 140 states have call predecessors, (146), 146 states have call successors, (146) [2022-11-19 08:35:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 519 transitions. [2022-11-19 08:35:10,903 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 519 transitions. Word has length 110 [2022-11-19 08:35:10,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:10,903 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 519 transitions. [2022-11-19 08:35:10,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 14 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 14 states have call predecessors, (38), 12 states have call successors, (38) [2022-11-19 08:35:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 519 transitions. [2022-11-19 08:35:10,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 08:35:10,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:10,906 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:10,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:11,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:35:11,113 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:35:11,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:11,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1538893617, now seen corresponding path program 3 times [2022-11-19 08:35:11,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:11,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952065955] [2022-11-19 08:35:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:11,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:11,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:35:11,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856328712] [2022-11-19 08:35:11,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:35:11,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:11,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:11,130 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:11,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3424e358-89c1-4af7-a326-234b57b6217e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:35:11,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:35:11,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:11,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-19 08:35:11,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2022-11-19 08:35:12,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-11-19 08:35:19,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952065955] [2022-11-19 08:35:19,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:35:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856328712] [2022-11-19 08:35:19,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856328712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [384771632] [2022-11-19 08:35:19,175 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-19 08:35:19,175 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:35:19,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:35:19,176 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:35:19,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:35:22,520 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2022-11-19 08:35:22,568 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 08:35:22,587 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:36:04,115 WARN L233 SmtUtils]: Spent 34.95s on a formula simplification. DAG size of input: 180 DAG size of output: 147 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:36:18,728 WARN L233 SmtUtils]: Spent 7.02s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)