./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/dijkstra-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/dijkstra-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta --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 b586a178399b4c0df2fdcb66faa06566663e0a18b90a5f0ce0551810014ff769 --- 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-dbf71c6-m [2022-10-17 17:41:06,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:41:06,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:41:06,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:41:06,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:41:06,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:41:06,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:41:06,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:41:06,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:41:06,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:41:06,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:41:06,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:41:06,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:41:06,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:41:06,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:41:06,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:41:06,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:41:06,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:41:06,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:41:06,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:41:06,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:41:06,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:41:07,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:41:07,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:41:07,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:41:07,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:41:07,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:41:07,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:41:07,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:41:07,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:41:07,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:41:07,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:41:07,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:41:07,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:41:07,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:41:07,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:41:07,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:41:07,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:41:07,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:41:07,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:41:07,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:41:07,030 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:41:07,076 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:41:07,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:41:07,077 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:41:07,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:41:07,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:41:07,078 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:41:07,078 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:41:07,079 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:41:07,079 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:41:07,079 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:41:07,080 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:41:07,080 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:41:07,080 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:41:07,080 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:41:07,081 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:41:07,081 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:41:07,081 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:41:07,081 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:41:07,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:41:07,082 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:41:07,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:41:07,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:41:07,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:41:07,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:41:07,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:41:07,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:41:07,085 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:41:07,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:41:07,085 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:41:07,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:41:07,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:41:07,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:41:07,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:07,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:41:07,086 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:41:07,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:41:07,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:41:07,087 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:41:07,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:41:07,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:41:07,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:41:07,088 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_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b586a178399b4c0df2fdcb66faa06566663e0a18b90a5f0ce0551810014ff769 [2022-10-17 17:41:07,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:41:07,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:41:07,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:41:07,407 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:41:07,408 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:41:07,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/nla-digbench/dijkstra-u.c [2022-10-17 17:41:07,474 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/data/7ae5d2e71/46c6e594d87f4689ada7100e000bdff4/FLAG299323367 [2022-10-17 17:41:08,008 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:41:08,013 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/sv-benchmarks/c/nla-digbench/dijkstra-u.c [2022-10-17 17:41:08,023 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/data/7ae5d2e71/46c6e594d87f4689ada7100e000bdff4/FLAG299323367 [2022-10-17 17:41:08,366 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/data/7ae5d2e71/46c6e594d87f4689ada7100e000bdff4 [2022-10-17 17:41:08,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:41:08,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:41:08,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:08,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:41:08,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:41:08,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:08" (1/1) ... [2022-10-17 17:41:08,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b27a9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:08, skipping insertion in model container [2022-10-17 17:41:08,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:08" (1/1) ... [2022-10-17 17:41:08,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:41:08,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:41:08,646 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/sv-benchmarks/c/nla-digbench/dijkstra-u.c[525,538] [2022-10-17 17:41:08,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:08,699 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:41:08,712 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/sv-benchmarks/c/nla-digbench/dijkstra-u.c[525,538] [2022-10-17 17:41:08,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:08,750 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:41:08,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:08 WrapperNode [2022-10-17 17:41:08,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:08,752 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:08,752 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:41:08,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:41:08,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:08" (1/1) ... [2022-10-17 17:41:08,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:08" (1/1) ... [2022-10-17 17:41:08,792 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-10-17 17:41:08,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:08,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:41:08,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:41:08,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:41:08,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:08" (1/1) ... [2022-10-17 17:41:08,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:08" (1/1) ... [2022-10-17 17:41:08,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:08" (1/1) ... [2022-10-17 17:41:08,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:08" (1/1) ... [2022-10-17 17:41:08,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:08" (1/1) ... [2022-10-17 17:41:08,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:08" (1/1) ... [2022-10-17 17:41:08,828 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:08" (1/1) ... [2022-10-17 17:41:08,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:08" (1/1) ... [2022-10-17 17:41:08,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:41:08,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:41:08,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:41:08,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:41:08,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:08" (1/1) ... [2022-10-17 17:41:08,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:08,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:08,888 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:41:08,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:41:08,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:41:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:41:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:41:08,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:41:08,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 17:41:08,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 17:41:09,000 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:41:09,002 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:41:09,277 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:41:09,354 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:41:09,355 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 17:41:09,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:09 BoogieIcfgContainer [2022-10-17 17:41:09,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:41:09,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:41:09,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:41:09,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:41:09,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:41:08" (1/3) ... [2022-10-17 17:41:09,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82fe5be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:09, skipping insertion in model container [2022-10-17 17:41:09,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:08" (2/3) ... [2022-10-17 17:41:09,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82fe5be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:09, skipping insertion in model container [2022-10-17 17:41:09,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:09" (3/3) ... [2022-10-17 17:41:09,381 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u.c [2022-10-17 17:41:09,414 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:41:09,414 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:41:09,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:41:09,508 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;@72b0a7c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:41:09,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:41:09,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 17:41:09,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:41:09,520 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:09,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:09,521 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:09,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:09,527 INFO L85 PathProgramCache]: Analyzing trace with hash -296058969, now seen corresponding path program 1 times [2022-10-17 17:41:09,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:09,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927166774] [2022-10-17 17:41:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:09,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:09,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:09,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927166774] [2022-10-17 17:41:09,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-17 17:41:09,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896353061] [2022-10-17 17:41:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:09,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:09,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:09,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:41:09,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:41:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:09,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 17:41:09,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:41:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:09,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:41:09,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896353061] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:09,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:09,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:41:09,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855220835] [2022-10-17 17:41:09,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:09,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:41:09,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:09,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:41:09,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:41:09,836 INFO L87 Difference]: Start difference. First operand has 22 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:09,904 INFO L93 Difference]: Finished difference Result 41 states and 72 transitions. [2022-10-17 17:41:09,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:41:09,907 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-17 17:41:09,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:09,916 INFO L225 Difference]: With dead ends: 41 [2022-10-17 17:41:09,917 INFO L226 Difference]: Without dead ends: 20 [2022-10-17 17:41:09,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:41:09,925 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2022-10-17 17:41:09,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:41:09,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-10-17 17:41:09,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-10-17 17:41:09,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 17:41:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2022-10-17 17:41:09,998 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 7 [2022-10-17 17:41:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:09,998 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2022-10-17 17:41:09,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2022-10-17 17:41:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:41:10,003 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:10,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:10,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:41:10,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 17:41:10,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1723625815, now seen corresponding path program 1 times [2022-10-17 17:41:10,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:10,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149435962] [2022-10-17 17:41:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:10,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:11,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:11,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149435962] [2022-10-17 17:41:11,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149435962] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:11,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:11,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:41:11,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37053784] [2022-10-17 17:41:11,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:11,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:41:11,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:11,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:41:11,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:41:11,012 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:13,179 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 [] [2022-10-17 17:41:15,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:16,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:16,673 INFO L93 Difference]: Finished difference Result 39 states and 57 transitions. [2022-10-17 17:41:16,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:41:16,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-17 17:41:16,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:16,679 INFO L225 Difference]: With dead ends: 39 [2022-10-17 17:41:16,679 INFO L226 Difference]: Without dead ends: 35 [2022-10-17 17:41:16,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:41:16,681 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:16,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 90 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 90 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-10-17 17:41:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-17 17:41:16,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-10-17 17:41:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-10-17 17:41:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 51 transitions. [2022-10-17 17:41:16,713 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 51 transitions. Word has length 8 [2022-10-17 17:41:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:16,713 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 51 transitions. [2022-10-17 17:41:16,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:16,714 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 51 transitions. [2022-10-17 17:41:16,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 17:41:16,716 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:16,716 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:16,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:41:16,718 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:16,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:16,721 INFO L85 PathProgramCache]: Analyzing trace with hash -796843214, now seen corresponding path program 1 times [2022-10-17 17:41:16,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:16,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421101907] [2022-10-17 17:41:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:16,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:17,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:17,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421101907] [2022-10-17 17:41:17,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421101907] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:41:17,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592589197] [2022-10-17 17:41:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:17,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:17,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:17,133 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:41:17,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:41:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:17,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 17:41:17,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:41:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:17,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:41:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:17,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592589197] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:41:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1974139466] [2022-10-17 17:41:17,805 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:41:17,806 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:41:17,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:41:17,819 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:41:17,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:41:18,232 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2022-10-17 17:41:18,293 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:41:18,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '341#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:41:18,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:41:18,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:41:18,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-10-17 17:41:18,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731113261] [2022-10-17 17:41:18,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:41:18,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 17:41:18,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:18,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 17:41:18,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-10-17 17:41:18,759 INFO L87 Difference]: Start difference. First operand 35 states and 51 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:23,189 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 [] [2022-10-17 17:41:25,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 17:41:28,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:30,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:33,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:35,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:37,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:40,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:42,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:44,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:46,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:47,485 INFO L93 Difference]: Finished difference Result 77 states and 118 transitions. [2022-10-17 17:41:47,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 17:41:47,487 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 17:41:47,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:47,489 INFO L225 Difference]: With dead ends: 77 [2022-10-17 17:41:47,489 INFO L226 Difference]: Without dead ends: 58 [2022-10-17 17:41:47,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-10-17 17:41:47,491 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 107 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:47,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 129 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 227 Invalid, 11 Unknown, 0 Unchecked, 28.5s Time] [2022-10-17 17:41:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-10-17 17:41:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-10-17 17:41:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 28 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-10-17 17:41:47,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 85 transitions. [2022-10-17 17:41:47,516 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 85 transitions. Word has length 10 [2022-10-17 17:41:47,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:47,516 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 85 transitions. [2022-10-17 17:41:47,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:47,517 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 85 transitions. [2022-10-17 17:41:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 17:41:47,518 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:47,518 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:47,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:41:47,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:47,741 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:47,741 INFO L85 PathProgramCache]: Analyzing trace with hash -213922889, now seen corresponding path program 1 times [2022-10-17 17:41:47,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:47,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954509393] [2022-10-17 17:41:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:47,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:47,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:41:47,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675279372] [2022-10-17 17:41:47,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:47,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:47,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:47,752 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:41:47,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:41:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:47,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 17:41:47,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:41:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:41:47,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:41:47,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:47,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954509393] [2022-10-17 17:41:47,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:41:47,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675279372] [2022-10-17 17:41:47,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675279372] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:47,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:47,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:41:47,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999558749] [2022-10-17 17:41:47,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:47,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:41:47,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:47,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:41:47,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:41:47,955 INFO L87 Difference]: Start difference. First operand 57 states and 85 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:41:50,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:50,010 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2022-10-17 17:41:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:41:50,011 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), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-10-17 17:41:50,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:50,012 INFO L225 Difference]: With dead ends: 68 [2022-10-17 17:41:50,012 INFO L226 Difference]: Without dead ends: 45 [2022-10-17 17:41:50,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:41:50,013 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:50,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 87 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-10-17 17:41:50,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-17 17:41:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-10-17 17:41:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-10-17 17:41:50,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 67 transitions. [2022-10-17 17:41:50,026 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 67 transitions. Word has length 18 [2022-10-17 17:41:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:50,027 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 67 transitions. [2022-10-17 17:41:50,027 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), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:41:50,027 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 67 transitions. [2022-10-17 17:41:50,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 17:41:50,034 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:50,034 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:50,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:41:50,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:50,239 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:50,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:50,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2000693202, now seen corresponding path program 1 times [2022-10-17 17:41:50,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:50,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348894428] [2022-10-17 17:41:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:50,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:50,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:41:50,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697936413] [2022-10-17 17:41:50,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:50,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:50,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:50,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:41:50,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:41:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:50,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:41:50,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:41:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-10-17 17:41:50,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:41:50,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:50,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348894428] [2022-10-17 17:41:50,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 17:41:50,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697936413] [2022-10-17 17:41:50,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697936413] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:50,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:50,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:41:50,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263188479] [2022-10-17 17:41:50,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:50,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:41:50,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:50,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:41:50,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:41:50,446 INFO L87 Difference]: Start difference. First operand 45 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:41:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:50,985 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2022-10-17 17:41:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:41:50,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-10-17 17:41:50,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:50,987 INFO L225 Difference]: With dead ends: 55 [2022-10-17 17:41:50,988 INFO L226 Difference]: Without dead ends: 52 [2022-10-17 17:41:50,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:41:50,989 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:50,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 90 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:41:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-10-17 17:41:51,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-10-17 17:41:51,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-10-17 17:41:51,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-10-17 17:41:51,004 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 20 [2022-10-17 17:41:51,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:51,004 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-10-17 17:41:51,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:41:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-10-17 17:41:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 17:41:51,006 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:51,006 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:51,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:41:51,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:51,221 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:51,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:51,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1370993795, now seen corresponding path program 1 times [2022-10-17 17:41:51,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:51,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433515619] [2022-10-17 17:41:51,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:51,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:51,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 17:41:51,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328167302] [2022-10-17 17:41:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:51,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:41:51,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:51,233 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:41:51,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa494210-da29-4275-bb7b-09c02793854c/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process