./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/sum02-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/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_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/sum02-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/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_6fabf981-c76f-4d92-8fea-2555d87c5ea8/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 80bce81184682208d15520c2d0ae5d9c5f1236c4de557bfddd91c6f88a04aad8 --- 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 06:54:35,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:54:35,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:54:35,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:54:35,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:54:35,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:54:35,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:54:35,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:54:35,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:54:35,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:54:35,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:54:35,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:54:35,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:54:35,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:54:35,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:54:35,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:54:35,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:54:35,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:54:35,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:54:35,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:54:35,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:54:35,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:54:35,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:54:35,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:54:35,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:54:35,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:54:35,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:54:35,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:54:35,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:54:35,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:54:35,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:54:35,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:54:35,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:54:35,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:54:35,652 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:54:35,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:54:35,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:54:35,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:54:35,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:54:35,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:54:35,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:54:35,657 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:54:35,679 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:54:35,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:54:35,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:54:35,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:54:35,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:54:35,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:54:35,681 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:54:35,682 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:54:35,682 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:54:35,682 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:54:35,683 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:54:35,683 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:54:35,683 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:54:35,683 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:54:35,684 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:54:35,684 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:54:35,684 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:54:35,684 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:54:35,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:54:35,685 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:54:35,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:54:35,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:54:35,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:54:35,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:54:35,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:54:35,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:54:35,687 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:54:35,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:54:35,687 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:54:35,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:54:35,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:54:35,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:54:35,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:54:35,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:54:35,689 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:54:35,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:54:35,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:54:35,689 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:54:35,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:54:35,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:54:35,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:54:35,690 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_6fabf981-c76f-4d92-8fea-2555d87c5ea8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 80bce81184682208d15520c2d0ae5d9c5f1236c4de557bfddd91c6f88a04aad8 [2022-11-19 06:54:35,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:54:35,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:54:35,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:54:35,985 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:54:35,985 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:54:35,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/bitvector/sum02-2.c [2022-11-19 06:54:36,059 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/data/9e48d5988/06290e699fc943899dcb405c513e616c/FLAG54db39bfc [2022-11-19 06:54:36,514 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:54:36,515 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/sv-benchmarks/c/bitvector/sum02-2.c [2022-11-19 06:54:36,521 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/data/9e48d5988/06290e699fc943899dcb405c513e616c/FLAG54db39bfc [2022-11-19 06:54:36,919 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/data/9e48d5988/06290e699fc943899dcb405c513e616c [2022-11-19 06:54:36,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:54:36,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:54:36,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:54:36,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:54:36,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:54:36,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:54:36" (1/1) ... [2022-11-19 06:54:36,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61bd2985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:36, skipping insertion in model container [2022-11-19 06:54:36,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:54:36" (1/1) ... [2022-11-19 06:54:36,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:54:36,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:54:37,166 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_6fabf981-c76f-4d92-8fea-2555d87c5ea8/sv-benchmarks/c/bitvector/sum02-2.c[711,724] [2022-11-19 06:54:37,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:54:37,192 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:54:37,204 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_6fabf981-c76f-4d92-8fea-2555d87c5ea8/sv-benchmarks/c/bitvector/sum02-2.c[711,724] [2022-11-19 06:54:37,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:54:37,222 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:54:37,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:37 WrapperNode [2022-11-19 06:54:37,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:54:37,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:54:37,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:54:37,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:54:37,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:37" (1/1) ... [2022-11-19 06:54:37,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:37" (1/1) ... [2022-11-19 06:54:37,254 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 36 [2022-11-19 06:54:37,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:54:37,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:54:37,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:54:37,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:54:37,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:37" (1/1) ... [2022-11-19 06:54:37,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:37" (1/1) ... [2022-11-19 06:54:37,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:37" (1/1) ... [2022-11-19 06:54:37,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:37" (1/1) ... [2022-11-19 06:54:37,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:37" (1/1) ... [2022-11-19 06:54:37,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:37" (1/1) ... [2022-11-19 06:54:37,272 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:37" (1/1) ... [2022-11-19 06:54:37,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:37" (1/1) ... [2022-11-19 06:54:37,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:54:37,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:54:37,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:54:37,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:54:37,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:37" (1/1) ... [2022-11-19 06:54:37,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:54:37,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:37,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:54:37,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:54:37,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:54:37,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:54:37,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:54:37,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:54:37,415 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:54:37,417 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:54:37,589 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:54:37,649 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:54:37,649 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:54:37,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:54:37 BoogieIcfgContainer [2022-11-19 06:54:37,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:54:37,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:54:37,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:54:37,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:54:37,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:54:36" (1/3) ... [2022-11-19 06:54:37,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7130c052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:54:37, skipping insertion in model container [2022-11-19 06:54:37,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:54:37" (2/3) ... [2022-11-19 06:54:37,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7130c052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:54:37, skipping insertion in model container [2022-11-19 06:54:37,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:54:37" (3/3) ... [2022-11-19 06:54:37,663 INFO L112 eAbstractionObserver]: Analyzing ICFG sum02-2.c [2022-11-19 06:54:37,682 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:54:37,682 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:54:37,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:54:37,737 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;@4a3579e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:54:37,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:54:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:37,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 06:54:37,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:37,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 06:54:37,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:54:37,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:37,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2279365, now seen corresponding path program 1 times [2022-11-19 06:54:37,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:37,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612765229] [2022-11-19 06:54:37,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:37,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:37,894 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:54:37,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132786481] [2022-11-19 06:54:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:37,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:37,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:37,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:37,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:54:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:37,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:54:37,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:38,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:54:38,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:38,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612765229] [2022-11-19 06:54:38,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:54:38,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132786481] [2022-11-19 06:54:38,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132786481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:38,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:38,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:54:38,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555554462] [2022-11-19 06:54:38,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:38,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:54:38,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:38,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:54:38,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:54:38,101 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:38,168 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-11-19 06:54:38,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:54:38,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 06:54:38,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:38,187 INFO L225 Difference]: With dead ends: 13 [2022-11-19 06:54:38,187 INFO L226 Difference]: Without dead ends: 6 [2022-11-19 06:54:38,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:54:38,193 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:38,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:54:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-11-19 06:54:38,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-11-19 06:54:38,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-11-19 06:54:38,245 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-11-19 06:54:38,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:38,246 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-11-19 06:54:38,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:38,247 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-11-19 06:54:38,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 06:54:38,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:38,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 06:54:38,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 06:54:38,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 06:54:38,454 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:54:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:38,455 INFO L85 PathProgramCache]: Analyzing trace with hash 70441173, now seen corresponding path program 1 times [2022-11-19 06:54:38,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:38,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76437015] [2022-11-19 06:54:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:38,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:38,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:54:38,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920951295] [2022-11-19 06:54:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:38,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:38,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:38,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:38,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:54:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:38,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 06:54:38,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:38,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:38,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:38,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76437015] [2022-11-19 06:54:38,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:54:38,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920951295] [2022-11-19 06:54:38,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920951295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:54:38,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [882336733] [2022-11-19 06:54:39,009 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 06:54:39,011 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:54:39,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:54:39,022 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:54:39,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:54:39,285 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:54:40,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '79#(and (not (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) |ULTIMATE.start_main_~nl~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~gauss~0#1| (div (mod (+ (* |ULTIMATE.start_main_~nl~0#1| |ULTIMATE.start_main_~nl~0#1|) |ULTIMATE.start_main_~nl~0#1|) 18446744073709551616) 2)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (or (= 0 (mod |ULTIMATE.start_main_~sn~0#1| 18446744073709551616)) (= (mod |ULTIMATE.start_main_~gauss~0#1| 18446744073709551616) (mod |ULTIMATE.start_main_~sn~0#1| 18446744073709551616))) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 06:54:40,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:54:40,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:54:40,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-19 06:54:40,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201570959] [2022-11-19 06:54:40,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:54:40,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:54:40,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:40,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:54:40,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:54:40,079 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:40,195 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2022-11-19 06:54:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:54:40,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 06:54:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:40,197 INFO L225 Difference]: With dead ends: 10 [2022-11-19 06:54:40,197 INFO L226 Difference]: Without dead ends: 7 [2022-11-19 06:54:40,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:54:40,198 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:40,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:54:40,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-11-19 06:54:40,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-11-19 06:54:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2022-11-19 06:54:40,202 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2022-11-19 06:54:40,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:40,202 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2022-11-19 06:54:40,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:54:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2022-11-19 06:54:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:54:40,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:40,203 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-19 06:54:40,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:54:40,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:40,407 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:54:40,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2111510075, now seen corresponding path program 2 times [2022-11-19 06:54:40,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:40,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213626461] [2022-11-19 06:54:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:40,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:40,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:54:40,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757173545] [2022-11-19 06:54:40,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:54:40,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:40,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:40,427 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:40,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:54:40,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 06:54:40,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:54:40,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 06:54:40,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:40,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:45,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:45,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213626461] [2022-11-19 06:54:45,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:54:45,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757173545] [2022-11-19 06:54:45,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757173545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:54:45,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [136221949] [2022-11-19 06:54:45,791 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 06:54:45,792 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:54:45,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:54:45,792 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:54:45,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:54:45,971 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:54:52,431 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '147#(and (not (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) |ULTIMATE.start_main_~nl~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~gauss~0#1| (div (mod (+ (* |ULTIMATE.start_main_~nl~0#1| |ULTIMATE.start_main_~nl~0#1|) |ULTIMATE.start_main_~nl~0#1|) 18446744073709551616) 2)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (or (= 0 (mod |ULTIMATE.start_main_~sn~0#1| 18446744073709551616)) (= (mod |ULTIMATE.start_main_~gauss~0#1| 18446744073709551616) (mod |ULTIMATE.start_main_~sn~0#1| 18446744073709551616))) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 06:54:52,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:54:52,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:54:52,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-19 06:54:52,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120234234] [2022-11-19 06:54:52,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:54:52,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 06:54:52,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:52,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 06:54:52,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-19 06:54:52,435 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 10 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:05,132 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:55:06,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:06,938 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2022-11-19 06:55:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 06:55:06,939 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 06:55:06,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:06,939 INFO L225 Difference]: With dead ends: 15 [2022-11-19 06:55:06,940 INFO L226 Difference]: Without dead ends: 11 [2022-11-19 06:55:06,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:55:06,942 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:06,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 12 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 06:55:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-19 06:55:06,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-19 06:55:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2022-11-19 06:55:06,949 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2022-11-19 06:55:06,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:06,950 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2022-11-19 06:55:06,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.1) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2022-11-19 06:55:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 06:55:06,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:06,951 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2022-11-19 06:55:06,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:07,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:07,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:07,160 INFO L85 PathProgramCache]: Analyzing trace with hash 474459589, now seen corresponding path program 3 times [2022-11-19 06:55:07,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:07,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239511101] [2022-11-19 06:55:07,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:07,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:07,176 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:55:07,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900362929] [2022-11-19 06:55:07,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:55:07,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:07,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:07,178 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:07,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:55:07,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:55:07,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:55:07,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-19 06:55:07,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:07,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:22,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:22,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239511101] [2022-11-19 06:55:22,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:55:22,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900362929] [2022-11-19 06:55:22,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900362929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:22,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [296753828] [2022-11-19 06:55:22,773 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 06:55:22,773 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:55:22,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:55:22,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:55:22,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:55:22,981 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:55:33,887 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '272#(and (not (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) |ULTIMATE.start_main_~nl~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~gauss~0#1| (div (mod (+ (* |ULTIMATE.start_main_~nl~0#1| |ULTIMATE.start_main_~nl~0#1|) |ULTIMATE.start_main_~nl~0#1|) 18446744073709551616) 2)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (or (= 0 (mod |ULTIMATE.start_main_~sn~0#1| 18446744073709551616)) (= (mod |ULTIMATE.start_main_~gauss~0#1| 18446744073709551616) (mod |ULTIMATE.start_main_~sn~0#1| 18446744073709551616))) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 06:55:33,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:55:33,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:55:33,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-19 06:55:33,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087047806] [2022-11-19 06:55:33,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:33,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 06:55:33,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:33,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 06:55:33,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-11-19 06:55:33,891 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 18 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:55:36,305 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse7 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (.cse6 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (.cse20 (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296))) (let ((.cse17 (<= .cse6 .cse20)) (.cse13 (<= .cse7 .cse20)) (.cse9 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse21 (mod (+ 5 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse5 (mod (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse8 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 4) 4294967296))) (let ((.cse0 (<= .cse8 .cse20)) (.cse10 (<= .cse5 .cse20)) (.cse1 (<= .cse21 .cse20)) (.cse14 (<= .cse9 .cse20)) (.cse4 (not .cse13)) (.cse19 (not .cse17)) (.cse3 (mod (div (mod (+ (* .cse20 .cse20) .cse20) 18446744073709551616) 2) 18446744073709551616))) (and (let ((.cse2 (mod (+ .cse5 .cse6 .cse7 |c_ULTIMATE.start_main_~sn~0#1| .cse8 .cse9) 18446744073709551616))) (or (not .cse0) .cse1 (= .cse2 .cse3) .cse4 (= .cse2 0))) (let ((.cse11 (mod (+ .cse5 .cse6 .cse7 |c_ULTIMATE.start_main_~sn~0#1| .cse9) 18446744073709551616))) (or (not .cse10) .cse0 (= .cse11 0) (= .cse11 .cse3) .cse4)) (let ((.cse12 (mod |c_ULTIMATE.start_main_~sn~0#1| 18446744073709551616))) (or (= .cse12 0) (= .cse12 .cse3) .cse13)) (let ((.cse15 (mod (+ .cse6 .cse7 |c_ULTIMATE.start_main_~sn~0#1| .cse9) 18446744073709551616))) (or (not .cse14) (= .cse15 0) .cse10 .cse4 (= .cse3 .cse15))) (let ((.cse16 (mod (+ .cse7 |c_ULTIMATE.start_main_~sn~0#1|) 18446744073709551616))) (or (= .cse3 .cse16) .cse17 .cse4 (= .cse16 0))) (let ((.cse18 (mod (+ .cse21 .cse5 .cse6 .cse7 |c_ULTIMATE.start_main_~sn~0#1| .cse8 .cse9) 18446744073709551616))) (or (= 0 .cse18) (= .cse3 .cse18) (not .cse1) .cse19 (<= (mod (+ 6 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) .cse20))) (let ((.cse22 (mod (+ .cse6 .cse7 |c_ULTIMATE.start_main_~sn~0#1|) 18446744073709551616))) (or .cse14 (= .cse22 0) .cse4 .cse19 (= .cse3 .cse22))))))) is different from true [2022-11-19 06:55:55,159 WARN L233 SmtUtils]: Spent 18.25s 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 06:56:11,525 WARN L233 SmtUtils]: Spent 14.36s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:56:26,523 WARN L233 SmtUtils]: Spent 13.97s 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 06:56:44,086 WARN L233 SmtUtils]: Spent 9.17s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:57:00,361 WARN L233 SmtUtils]: Spent 11.62s 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 06:57:00,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:00,368 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2022-11-19 06:57:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 06:57:00,369 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 06:57:00,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:00,369 INFO L225 Difference]: With dead ends: 24 [2022-11-19 06:57:00,369 INFO L226 Difference]: Without dead ends: 19 [2022-11-19 06:57:00,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 105.2s TimeCoverageRelationStatistics Valid=231, Invalid=584, Unknown=1, NotChecked=54, Total=870 [2022-11-19 06:57:00,371 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:00,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 10 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 94 Invalid, 0 Unknown, 2 Unchecked, 2.9s Time] [2022-11-19 06:57:00,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-19 06:57:00,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-19 06:57:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-11-19 06:57:00,392 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2022-11-19 06:57:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:00,392 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-11-19 06:57:00,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-11-19 06:57:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 06:57:00,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:00,394 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1] [2022-11-19 06:57:00,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 06:57:00,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:00,604 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:00,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:00,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1552364997, now seen corresponding path program 4 times [2022-11-19 06:57:00,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:00,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858105671] [2022-11-19 06:57:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:00,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:00,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:57:00,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049594489] [2022-11-19 06:57:00,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:57:00,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:00,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:00,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:00,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fabf981-c76f-4d92-8fea-2555d87c5ea8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:57:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:00,999 WARN L261 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-19 06:57:01,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:01,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:39,573 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse3 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (.cse0 (mod (+ 12 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (let ((.cse2 (mod (+ (mod (+ 5 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) (mod (+ 7 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) (mod (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) .cse3 (mod (+ 8 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) |c_ULTIMATE.start_main_~sn~0#1| (mod (+ |c_ULTIMATE.start_main_~i~0#1| 10) 4294967296) .cse0 (mod (+ 9 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) (mod (+ |c_ULTIMATE.start_main_~i~0#1| 4) 4294967296) (mod (+ 6 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) (mod (+ |c_ULTIMATE.start_main_~i~0#1| 11) 4294967296) (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) 18446744073709551616)) (.cse1 (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296))) (or (not (<= .cse0 .cse1)) (= .cse2 0) (<= (mod (+ |c_ULTIMATE.start_main_~i~0#1| 13) 4294967296) .cse1) (not (<= .cse3 .cse1)) (= .cse2 (mod (div (mod (+ (* .cse1 .cse1) .cse1) 18446744073709551616) 2) 18446744073709551616))))) is different from true [2022-11-19 06:59:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 78 refuted. 13 times theorem prover too weak. 0 trivial. 14 not checked. [2022-11-19 06:59:06,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:06,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858105671] [2022-11-19 06:59:06,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:59:06,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049594489] [2022-11-19 06:59:06,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049594489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:06,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1885070572] [2022-11-19 06:59:06,656 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 06:59:06,656 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:06,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:06,656 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:06,657 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:06,970 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:59:19,298 WARN L233 SmtUtils]: Spent 7.65s on a formula simplification. DAG size of input: 53 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:59:27,162 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '502#(and (not (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) |ULTIMATE.start_main_~nl~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~gauss~0#1| (div (mod (+ (* |ULTIMATE.start_main_~nl~0#1| |ULTIMATE.start_main_~nl~0#1|) |ULTIMATE.start_main_~nl~0#1|) 18446744073709551616) 2)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (or (= 0 (mod |ULTIMATE.start_main_~sn~0#1| 18446744073709551616)) (= (mod |ULTIMATE.start_main_~gauss~0#1| 18446744073709551616) (mod |ULTIMATE.start_main_~sn~0#1| 18446744073709551616))) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 06:59:27,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:59:27,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:59:27,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2022-11-19 06:59:27,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783261848] [2022-11-19 06:59:27,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:27,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 06:59:27,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:27,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 06:59:27,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=948, Unknown=17, NotChecked=68, Total=1332 [2022-11-19 06:59:27,164 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 34 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:29,366 WARN L233 SmtUtils]: Spent 4.87m on a formula simplification that was a NOOP. DAG size: 159 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:04:31,415 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 07:08:54,992 WARN L233 SmtUtils]: Spent 4.26m on a formula simplification that was a NOOP. DAG size: 149 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)