./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/hard2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/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_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/hard2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/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_74aa9830-d517-49c3-ab7c-5ed8e8a675de/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 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 --- 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 06:43:15,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:43:15,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:43:15,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:43:16,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:43:16,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:43:16,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:43:16,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:43:16,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:43:16,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:43:16,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:43:16,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:43:16,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:43:16,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:43:16,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:43:16,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:43:16,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:43:16,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:43:16,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:43:16,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:43:16,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:43:16,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:43:16,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:43:16,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:43:16,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:43:16,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:43:16,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:43:16,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:43:16,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:43:16,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:43:16,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:43:16,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:43:16,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:43:16,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:43:16,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:43:16,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:43:16,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:43:16,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:43:16,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:43:16,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:43:16,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:43:16,086 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:43:16,123 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:43:16,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:43:16,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:43:16,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:43:16,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:43:16,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:43:16,126 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:43:16,126 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:43:16,126 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:43:16,126 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:43:16,127 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:43:16,127 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:43:16,128 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:43:16,128 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:43:16,128 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:43:16,128 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:43:16,128 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:43:16,129 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:43:16,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:43:16,129 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:43:16,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:43:16,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:43:16,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:43:16,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:43:16,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:43:16,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:43:16,133 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:43:16,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:43:16,133 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:43:16,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:43:16,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:43:16,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:43:16,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:43:16,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:43:16,134 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:43:16,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:43:16,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:43:16,135 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:43:16,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:43:16,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:43:16,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:43:16,136 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_74aa9830-d517-49c3-ab7c-5ed8e8a675de/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 [2022-11-19 06:43:16,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:43:16,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:43:16,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:43:16,431 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:43:16,432 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:43:16,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench/hard2.c [2022-11-19 06:43:16,517 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/data/16b28b624/1712cec3442646fd8468fe65de36f637/FLAGef1b21908 [2022-11-19 06:43:16,938 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:43:16,939 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/sv-benchmarks/c/nla-digbench/hard2.c [2022-11-19 06:43:16,946 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/data/16b28b624/1712cec3442646fd8468fe65de36f637/FLAGef1b21908 [2022-11-19 06:43:17,370 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/data/16b28b624/1712cec3442646fd8468fe65de36f637 [2022-11-19 06:43:17,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:43:17,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:43:17,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:43:17,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:43:17,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:43:17,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a6cd88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17, skipping insertion in model container [2022-11-19 06:43:17,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:43:17,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:43:17,596 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_74aa9830-d517-49c3-ab7c-5ed8e8a675de/sv-benchmarks/c/nla-digbench/hard2.c[526,539] [2022-11-19 06:43:17,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:43:17,620 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:43:17,634 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_74aa9830-d517-49c3-ab7c-5ed8e8a675de/sv-benchmarks/c/nla-digbench/hard2.c[526,539] [2022-11-19 06:43:17,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:43:17,653 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:43:17,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17 WrapperNode [2022-11-19 06:43:17,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:43:17,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:43:17,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:43:17,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:43:17,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,688 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2022-11-19 06:43:17,688 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:43:17,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:43:17,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:43:17,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:43:17,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,709 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:43:17,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:43:17,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:43:17,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:43:17,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17" (1/1) ... [2022-11-19 06:43:17,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:43:17,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:17,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:43:17,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:43:17,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:43:17,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:43:17,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:43:17,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:43:17,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 06:43:17,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 06:43:17,846 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:43:17,848 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:43:18,002 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:43:18,036 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:43:18,036 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 06:43:18,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:43:18 BoogieIcfgContainer [2022-11-19 06:43:18,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:43:18,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:43:18,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:43:18,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:43:18,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:43:17" (1/3) ... [2022-11-19 06:43:18,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150c354d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:43:18, skipping insertion in model container [2022-11-19 06:43:18,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:17" (2/3) ... [2022-11-19 06:43:18,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150c354d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:43:18, skipping insertion in model container [2022-11-19 06:43:18,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:43:18" (3/3) ... [2022-11-19 06:43:18,060 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2.c [2022-11-19 06:43:18,080 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:43:18,080 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:43:18,133 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:43:18,140 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;@57c14804, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:43:18,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:43:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 06:43:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:43:18,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:18,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:43:18,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:18,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1133642604, now seen corresponding path program 1 times [2022-11-19 06:43:18,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:18,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264153458] [2022-11-19 06:43:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:18,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:18,521 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 06:43:18,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:18,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264153458] [2022-11-19 06:43:18,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264153458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:18,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:18,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:43:18,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273591264] [2022-11-19 06:43:18,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:18,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:43:18,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:18,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:43:18,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:43:18,563 INFO L87 Difference]: Start difference. First operand has 20 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-19 06:43:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:18,672 INFO L93 Difference]: Finished difference Result 51 states and 87 transitions. [2022-11-19 06:43:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:43:18,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2022-11-19 06:43:18,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:18,684 INFO L225 Difference]: With dead ends: 51 [2022-11-19 06:43:18,685 INFO L226 Difference]: Without dead ends: 28 [2022-11-19 06:43:18,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:43:18,692 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:18,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 77 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:18,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-19 06:43:18,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-11-19 06:43:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:43:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-11-19 06:43:18,760 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 6 [2022-11-19 06:43:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:18,761 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-11-19 06:43:18,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-19 06:43:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-11-19 06:43:18,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 06:43:18,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:18,764 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:18,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:43:18,765 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:18,768 INFO L85 PathProgramCache]: Analyzing trace with hash 372697474, now seen corresponding path program 1 times [2022-11-19 06:43:18,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:18,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840126437] [2022-11-19 06:43:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:18,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:18,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:18,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840126437] [2022-11-19 06:43:18,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840126437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:18,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:18,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:43:18,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564908427] [2022-11-19 06:43:18,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:18,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:43:18,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:18,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:43:18,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:43:18,960 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 06:43:19,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:19,040 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-11-19 06:43:19,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:43:19,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-19 06:43:19,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:19,042 INFO L225 Difference]: With dead ends: 34 [2022-11-19 06:43:19,043 INFO L226 Difference]: Without dead ends: 32 [2022-11-19 06:43:19,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:43:19,045 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:19,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 70 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:43:19,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-19 06:43:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-11-19 06:43:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:43:19,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-19 06:43:19,053 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2022-11-19 06:43:19,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:19,054 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-19 06:43:19,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 06:43:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-19 06:43:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 06:43:19,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:19,055 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:19,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:43:19,056 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:19,057 INFO L85 PathProgramCache]: Analyzing trace with hash -413140716, now seen corresponding path program 1 times [2022-11-19 06:43:19,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:19,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618571707] [2022-11-19 06:43:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:19,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:19,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:43:19,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107465266] [2022-11-19 06:43:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:19,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:19,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:19,110 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:19,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:43:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:19,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:43:19,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:43:19,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:43:19,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:19,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618571707] [2022-11-19 06:43:19,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:43:19,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107465266] [2022-11-19 06:43:19,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107465266] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:19,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126123338] [2022-11-19 06:43:19,503 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 06:43:19,503 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:19,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:19,513 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:19,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:19,968 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 66 for LOIs [2022-11-19 06:43:19,994 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:20,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [126123338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:20,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:43:20,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 7] total 15 [2022-11-19 06:43:20,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996135025] [2022-11-19 06:43:20,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:20,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:43:20,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:20,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:43:20,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-19 06:43:20,498 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 06:43:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:20,726 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-11-19 06:43:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:43:20,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 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 16 [2022-11-19 06:43:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:20,729 INFO L225 Difference]: With dead ends: 61 [2022-11-19 06:43:20,730 INFO L226 Difference]: Without dead ends: 43 [2022-11-19 06:43:20,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-19 06:43:20,737 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:20,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:43:20,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-19 06:43:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-19 06:43:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 06:43:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-11-19 06:43:20,772 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 16 [2022-11-19 06:43:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:20,774 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-11-19 06:43:20,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 06:43:20,774 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-11-19 06:43:20,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 06:43:20,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:20,776 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-19 06:43:20,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 06:43:20,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:20,982 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:20,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:20,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1951602144, now seen corresponding path program 1 times [2022-11-19 06:43:20,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:20,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064210789] [2022-11-19 06:43:20,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:20,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:20,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:43:20,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502468657] [2022-11-19 06:43:20,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:20,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:20,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:20,997 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:21,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:43:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:21,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 06:43:21,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 06:43:21,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 06:43:21,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:21,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064210789] [2022-11-19 06:43:21,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:43:21,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502468657] [2022-11-19 06:43:21,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502468657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:21,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1278379960] [2022-11-19 06:43:21,394 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 06:43:21,395 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:21,395 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:21,395 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:21,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:24,423 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-19 06:43:24,429 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:24,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '702#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:24,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:24,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:43:24,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-11-19 06:43:24,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959358165] [2022-11-19 06:43:24,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:24,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:43:24,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:24,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:43:24,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:43:24,997 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-19 06:43:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:25,304 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2022-11-19 06:43:25,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 06:43:25,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 33 [2022-11-19 06:43:25,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:25,308 INFO L225 Difference]: With dead ends: 77 [2022-11-19 06:43:25,308 INFO L226 Difference]: Without dead ends: 64 [2022-11-19 06:43:25,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-19 06:43:25,310 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:25,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 52 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:43:25,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-19 06:43:25,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-19 06:43:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 39 states have internal predecessors, (40), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-19 06:43:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-11-19 06:43:25,326 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 33 [2022-11-19 06:43:25,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:25,327 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-11-19 06:43:25,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-19 06:43:25,328 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-11-19 06:43:25,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 06:43:25,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:25,329 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:25,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:25,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:25,535 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:25,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:25,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1133925795, now seen corresponding path program 1 times [2022-11-19 06:43:25,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:25,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820251027] [2022-11-19 06:43:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:25,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:25,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:43:25,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743572756] [2022-11-19 06:43:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:25,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:25,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:25,558 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:25,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:43:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:25,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 06:43:25,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-19 06:43:25,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-19 06:43:25,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:25,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820251027] [2022-11-19 06:43:25,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:43:25,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743572756] [2022-11-19 06:43:25,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743572756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:25,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2078196133] [2022-11-19 06:43:25,932 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 06:43:25,932 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:25,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:25,933 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:25,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:28,749 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-19 06:43:28,784 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:29,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1174#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:29,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:29,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:43:29,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-19 06:43:29,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090268732] [2022-11-19 06:43:29,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:29,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 06:43:29,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:29,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 06:43:29,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-11-19 06:43:29,524 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-19 06:43:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:29,674 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2022-11-19 06:43:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:43:29,675 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 40 [2022-11-19 06:43:29,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:29,676 INFO L225 Difference]: With dead ends: 73 [2022-11-19 06:43:29,676 INFO L226 Difference]: Without dead ends: 71 [2022-11-19 06:43:29,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-19 06:43:29,677 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:29,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 37 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:29,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-19 06:43:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-11-19 06:43:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.125) internal successors, (45), 43 states have internal predecessors, (45), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-19 06:43:29,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-11-19 06:43:29,695 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 40 [2022-11-19 06:43:29,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:29,696 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-11-19 06:43:29,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-19 06:43:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-11-19 06:43:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 06:43:29,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:29,699 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:29,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:29,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:29,905 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:29,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:29,906 INFO L85 PathProgramCache]: Analyzing trace with hash 581212434, now seen corresponding path program 1 times [2022-11-19 06:43:29,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:29,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046703368] [2022-11-19 06:43:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:29,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:29,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:43:29,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196022849] [2022-11-19 06:43:29,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:29,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:29,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:29,917 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:29,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:43:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:29,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 06:43:29,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 06:43:30,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-19 06:43:32,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:32,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046703368] [2022-11-19 06:43:32,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:43:32,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196022849] [2022-11-19 06:43:32,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196022849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:32,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [343164687] [2022-11-19 06:43:32,510 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:43:32,510 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:32,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:32,511 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:32,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:36,255 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-19 06:43:36,263 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:37,096 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1723#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:37,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:37,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:43:37,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-19 06:43:37,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377019252] [2022-11-19 06:43:37,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:37,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 06:43:37,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:37,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 06:43:37,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-11-19 06:43:37,099 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-19 06:43:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:39,489 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-11-19 06:43:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:43:39,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 52 [2022-11-19 06:43:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:39,491 INFO L225 Difference]: With dead ends: 96 [2022-11-19 06:43:39,491 INFO L226 Difference]: Without dead ends: 94 [2022-11-19 06:43:39,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-11-19 06:43:39,493 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:39,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 68 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 06:43:39,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-19 06:43:39,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-11-19 06:43:39,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 60 states have internal predecessors, (61), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-19 06:43:39,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-11-19 06:43:39,525 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 52 [2022-11-19 06:43:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:39,525 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-11-19 06:43:39,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-19 06:43:39,526 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-11-19 06:43:39,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 06:43:39,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:39,528 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:39,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:39,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 06:43:39,735 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:39,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:39,735 INFO L85 PathProgramCache]: Analyzing trace with hash 174642699, now seen corresponding path program 1 times [2022-11-19 06:43:39,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:39,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806189470] [2022-11-19 06:43:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:39,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:39,753 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:43:39,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888653904] [2022-11-19 06:43:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:39,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:39,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:39,755 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:39,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:43:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:39,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 06:43:39,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-19 06:43:40,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-19 06:43:40,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:40,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806189470] [2022-11-19 06:43:40,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:43:40,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888653904] [2022-11-19 06:43:40,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888653904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:40,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [495642730] [2022-11-19 06:43:40,857 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-19 06:43:40,858 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:40,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:40,858 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:40,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:44,365 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-19 06:43:44,393 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:46,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2407#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:46,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:46,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:43:46,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-19 06:43:46,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226783393] [2022-11-19 06:43:46,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:46,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 06:43:46,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:46,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 06:43:46,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-19 06:43:46,126 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-19 06:43:48,978 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 06:43:51,279 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 06:43:51,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:51,581 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2022-11-19 06:43:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 06:43:51,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 63 [2022-11-19 06:43:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:51,584 INFO L225 Difference]: With dead ends: 114 [2022-11-19 06:43:51,584 INFO L226 Difference]: Without dead ends: 99 [2022-11-19 06:43:51,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2022-11-19 06:43:51,586 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 86 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:51,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 60 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 338 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2022-11-19 06:43:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-19 06:43:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2022-11-19 06:43:51,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-19 06:43:51,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2022-11-19 06:43:51,624 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 63 [2022-11-19 06:43:51,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:51,625 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2022-11-19 06:43:51,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-19 06:43:51,625 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2022-11-19 06:43:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 06:43:51,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:51,627 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:51,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:51,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:51,835 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:51,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:51,835 INFO L85 PathProgramCache]: Analyzing trace with hash 204977288, now seen corresponding path program 1 times [2022-11-19 06:43:51,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:51,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568219644] [2022-11-19 06:43:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:51,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:51,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:43:51,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085257467] [2022-11-19 06:43:51,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:51,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:51,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:51,865 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:51,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:43:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:51,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:43:51,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-19 06:43:52,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:43:52,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:52,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568219644] [2022-11-19 06:43:52,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:43:52,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085257467] [2022-11-19 06:43:52,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085257467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:52,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:52,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:43:52,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396839686] [2022-11-19 06:43:52,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:52,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:43:52,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:52,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:43:52,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:43:52,032 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-19 06:43:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:52,115 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2022-11-19 06:43:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:43:52,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 73 [2022-11-19 06:43:52,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:52,118 INFO L225 Difference]: With dead ends: 92 [2022-11-19 06:43:52,118 INFO L226 Difference]: Without dead ends: 80 [2022-11-19 06:43:52,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:43:52,120 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:52,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 71 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-19 06:43:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-19 06:43:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 17 states have call successors, (17), 12 states have call predecessors, (17), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-19 06:43:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-11-19 06:43:52,151 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 73 [2022-11-19 06:43:52,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:52,152 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-11-19 06:43:52,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-19 06:43:52,152 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-11-19 06:43:52,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 06:43:52,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:52,154 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:52,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:52,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:52,361 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:52,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2080478280, now seen corresponding path program 2 times [2022-11-19 06:43:52,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:52,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019931503] [2022-11-19 06:43:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:52,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:52,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:43:52,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552520792] [2022-11-19 06:43:52,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:43:52,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:52,382 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:52,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:43:52,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 06:43:52,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:43:52,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 06:43:52,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-19 06:43:52,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2022-11-19 06:43:54,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:54,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019931503] [2022-11-19 06:43:54,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:43:54,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552520792] [2022-11-19 06:43:54,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552520792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:54,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241598656] [2022-11-19 06:43:54,460 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:43:54,460 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:54,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:54,461 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:54,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:57,820 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-19 06:43:57,825 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:58,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3639#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:58,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:58,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:43:58,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-11-19 06:43:58,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590722612] [2022-11-19 06:43:58,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:58,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 06:43:58,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:58,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 06:43:58,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-11-19 06:43:58,979 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-11-19 06:44:03,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:03,147 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-11-19 06:44:03,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:44:03,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 74 [2022-11-19 06:44:03,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:03,149 INFO L225 Difference]: With dead ends: 112 [2022-11-19 06:44:03,150 INFO L226 Difference]: Without dead ends: 110 [2022-11-19 06:44:03,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 193 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-11-19 06:44:03,151 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:03,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 84 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 06:44:03,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-19 06:44:03,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2022-11-19 06:44:03,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-19 06:44:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2022-11-19 06:44:03,208 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 74 [2022-11-19 06:44:03,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:03,209 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2022-11-19 06:44:03,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-11-19 06:44:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2022-11-19 06:44:03,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 06:44:03,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:03,212 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-19 06:44:03,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:03,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:03,419 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:03,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:03,420 INFO L85 PathProgramCache]: Analyzing trace with hash -72875315, now seen corresponding path program 3 times [2022-11-19 06:44:03,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:03,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381943565] [2022-11-19 06:44:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:03,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:03,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:44:03,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715581358] [2022-11-19 06:44:03,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:44:03,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:03,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:03,433 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:03,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:44:03,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:44:03,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:44:03,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-19 06:44:03,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:34,204 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_96| Int) (|aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328| Int) (|aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| Int)) (let ((.cse0 (* |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse1 (* 2 |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328|))) (and (<= (* 2 (* |c_ULTIMATE.start_main_~B~0#1| |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328|)) |c_ULTIMATE.start_main_~A~0#1|) (<= (+ (* 2 |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137|) (* |aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_96| 4)) (+ .cse0 .cse1 1)) (<= (* |c_ULTIMATE.start_main_~p~0#1| 3) (* 6 |aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_96|)) (< |c_ULTIMATE.start_main_~A~0#1| (* (* |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| |c_ULTIMATE.start_main_~B~0#1|) 4)) (<= .cse0 (* |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| 4)) (<= .cse1 (+ |c_ULTIMATE.start_main_~p~0#1| 1))))) (let ((.cse2 (<= |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~A~0#1|))) (or (and (= (+ |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~A~0#1|) .cse2 (= |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (and (= 0 |c_ULTIMATE.start_main_~q~0#1|) (= |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~A~0#1|) (not .cse2)))) (= (* 2 (* (div (- |c_ULTIMATE.start_main_~p~0#1|) (- 2)) |c_ULTIMATE.start_main_~B~0#1|)) |c_ULTIMATE.start_main_~d~0#1|)) is different from false [2022-11-19 06:44:44,094 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328| Int) (|aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| Int)) (and (<= (+ 2 (* 2 (div (+ (- 1) |c_ULTIMATE.start_main_~p~0#1|) 2)) |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137|) (+ |c_ULTIMATE.start_main_~p~0#1| |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328|)) (<= (* 2 (* |c_ULTIMATE.start_main_~B~0#1| |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328|)) |c_ULTIMATE.start_main_~A~0#1|) (< |c_ULTIMATE.start_main_~A~0#1| (* (* |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| |c_ULTIMATE.start_main_~B~0#1|) 4)) (<= (* |c_ULTIMATE.start_main_~p~0#1| 2) (* |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| 4)) (<= (* 2 |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328|) (+ |c_ULTIMATE.start_main_~p~0#1| 1)))) (let ((.cse0 (<= |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~A~0#1|))) (or (and (= (+ |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~A~0#1|) .cse0 (= |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (and (= 0 |c_ULTIMATE.start_main_~q~0#1|) (= |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~A~0#1|) (not .cse0)))) (= (* 2 (* (div (- |c_ULTIMATE.start_main_~p~0#1|) (- 2)) |c_ULTIMATE.start_main_~B~0#1|)) |c_ULTIMATE.start_main_~d~0#1|)) is different from false [2022-11-19 06:44:56,599 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328| Int) (|aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| Int)) (and (<= (+ 2 (* 2 (div (+ (- 1) |c_ULTIMATE.start_main_~p~0#1|) 2)) |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137|) (+ |c_ULTIMATE.start_main_~p~0#1| |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328|)) (<= (* 2 (* |c_ULTIMATE.start_main_~B~0#1| |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328|)) |c_ULTIMATE.start_main_~A~0#1|) (< |c_ULTIMATE.start_main_~A~0#1| (* (* |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| |c_ULTIMATE.start_main_~B~0#1|) 4)) (<= (* |c_ULTIMATE.start_main_~p~0#1| 2) (* |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| 4)) (<= (* 2 |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328|) (+ |c_ULTIMATE.start_main_~p~0#1| 1)))) (= (* 2 (* (div (- |c_ULTIMATE.start_main_~p~0#1|) (- 2)) |c_ULTIMATE.start_main_~B~0#1|)) |c_ULTIMATE.start_main_~d~0#1|) (let ((.cse0 (<= |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~A~0#1|))) (or (and (= (+ |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~A~0#1|) .cse0 (= |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (and (= 0 |c_ULTIMATE.start_main_~q~0#1|) (not .cse0)))) (= |c_ULTIMATE.start_main_~A~0#1| (+ (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|))) is different from false [2022-11-19 06:45:19,203 WARN L233 SmtUtils]: Spent 10.87s on a formula simplification. DAG size of input: 52 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:45:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 100 proven. 62 refuted. 2 times theorem prover too weak. 192 trivial. 5 not checked. [2022-11-19 06:45:24,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:45:52,207 WARN L233 SmtUtils]: Spent 10.38s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:47:16,471 WARN L233 SmtUtils]: Spent 24.52s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:48:52,336 WARN L233 SmtUtils]: Spent 6.36s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:49:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 105 proven. 34 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-19 06:49:18,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:49:18,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381943565] [2022-11-19 06:49:18,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:49:18,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715581358] [2022-11-19 06:49:18,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715581358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:49:18,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [922444956] [2022-11-19 06:49:18,802 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:49:18,802 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:49:18,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:49:18,803 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:49:18,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:49:21,677 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-19 06:49:21,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:49:29,618 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4490#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:49:29,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:49:29,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:49:29,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2022-11-19 06:49:29,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589492211] [2022-11-19 06:49:29,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:49:29,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 06:49:29,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:49:29,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 06:49:29,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=926, Unknown=13, NotChecked=198, Total=1332 [2022-11-19 06:49:29,622 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 18 states have internal predecessors, (35), 17 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 14 states have call predecessors, (24), 15 states have call successors, (24) [2022-11-19 06:50:49,264 WARN L233 SmtUtils]: Spent 1.32m on a formula simplification. DAG size of input: 167 DAG size of output: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:50:52,129 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 06:51:08,258 WARN L233 SmtUtils]: Spent 12.61s on a formula simplification. DAG size of input: 125 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:51:10,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:51:12,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:51:30,566 WARN L233 SmtUtils]: Spent 13.45s on a formula simplification. DAG size of input: 125 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:51:32,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:51:34,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:51:52,577 WARN L233 SmtUtils]: Spent 14.97s on a formula simplification. DAG size of input: 127 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:51:54,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:51:57,557 WARN L539 Checker$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 06:51:59,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:52:01,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:52:25,497 WARN L233 SmtUtils]: Spent 15.89s on a formula simplification. DAG size of input: 76 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:52:30,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:52:32,008 WARN L539 Checker$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 06:52:35,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:52:36,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:52:38,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:52:39,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:52:42,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:52:44,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:52:46,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:52:47,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:52:49,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:53:00,289 WARN L233 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 166 DAG size of output: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:53:02,295 WARN L539 Checker$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 06:53:05,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:53:08,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:53:10,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:53:12,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 06:53:14,269 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse20 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse21 (* (div |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~B~0#1|)) (.cse11 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse22 (< |c_ULTIMATE.start_main_~p~0#1| 0))) (let ((.cse4 (and (not .cse11) .cse22)) (.cse8 (+ .cse20 |c_ULTIMATE.start_main_~r~0#1| .cse21)) (.cse10 (not .cse22)) (.cse9 (+ .cse20 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1| .cse21)) (.cse12 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse3 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse2 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse14 (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse20 |c_ULTIMATE.start_main_~r~0#1|)))) (and (exists ((|aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_96| Int) (|aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328| Int) (|aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| Int)) (let ((.cse0 (* |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse1 (* 2 |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328|))) (and (<= (* 2 (* |c_ULTIMATE.start_main_~B~0#1| |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328|)) |c_ULTIMATE.start_main_~A~0#1|) (<= (+ (* 2 |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137|) (* |aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_96| 4)) (+ .cse0 .cse1 1)) (<= (* |c_ULTIMATE.start_main_~p~0#1| 3) (* 6 |aux_div_aux_div_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_96|)) (< |c_ULTIMATE.start_main_~A~0#1| (* (* |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| |c_ULTIMATE.start_main_~B~0#1|) 4)) (<= .cse0 (* |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| 4)) (<= .cse1 (+ |c_ULTIMATE.start_main_~p~0#1| 1))))) (or (and .cse2 (not .cse3)) (let ((.cse13 (<= .cse12 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse5 (or .cse13 .cse14)) (.cse6 (not .cse13)) (.cse7 (+ .cse12 |c_ULTIMATE.start_main_~A~0#1|))) (and (or .cse4 (and .cse5 (or .cse6 (= .cse7 .cse8)))) (or (and .cse5 (or .cse6 (= .cse7 .cse9))) .cse10 .cse11))))) (let ((.cse15 (<= |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~A~0#1|))) (or (and (= (+ |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~A~0#1|) .cse15 (= |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (and (= 0 |c_ULTIMATE.start_main_~q~0#1|) (= |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~A~0#1|) (not .cse15)))) (= (* 2 (* (div (- |c_ULTIMATE.start_main_~p~0#1|) (- 2)) |c_ULTIMATE.start_main_~B~0#1|)) |c_ULTIMATE.start_main_~d~0#1|) (or (let ((.cse19 (<= (+ .cse12 1) |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse16 (or .cse19 .cse14)) (.cse17 (not .cse19)) (.cse18 (+ .cse12 |c_ULTIMATE.start_main_~A~0#1| 1))) (and (or .cse4 (and .cse16 (or .cse17 (= .cse18 .cse8)))) (or .cse10 (and .cse16 (or .cse17 (= .cse18 .cse9))) .cse11)))) .cse3 (not .cse2)) .cse14 (= (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~d~0#1|) .cse11))) is different from false [2022-11-19 06:53:46,321 WARN L233 SmtUtils]: Spent 9.21s on a formula simplification. DAG size of input: 93 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:53:48,331 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse17 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse12 (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse17 |c_ULTIMATE.start_main_~r~0#1|)))) (and (exists ((|aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328| Int) (|aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| Int)) (and (<= (+ 2 (* 2 (div (+ (- 1) |c_ULTIMATE.start_main_~p~0#1|) 2)) |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137|) (+ |c_ULTIMATE.start_main_~p~0#1| |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328|)) (<= (* 2 (* |c_ULTIMATE.start_main_~B~0#1| |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328|)) |c_ULTIMATE.start_main_~A~0#1|) (< |c_ULTIMATE.start_main_~A~0#1| (* (* |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| |c_ULTIMATE.start_main_~B~0#1|) 4)) (<= (* |c_ULTIMATE.start_main_~p~0#1| 2) (* |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_137| 4)) (<= (* 2 |aux_div_aux_div_aux_mod_aux_mod_aux_mod_aux_mod_aux_mod_v_ULTIMATE.start_main_~p~0#1_70_49_56_63_82_89_104_328|) (+ |c_ULTIMATE.start_main_~p~0#1| 1)))) (or (let ((.cse18 (* (div |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~B~0#1|)) (.cse9 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse19 (< |c_ULTIMATE.start_main_~p~0#1| 0))) (let ((.cse2 (and (not .cse9) .cse19)) (.cse6 (+ .cse17 |c_ULTIMATE.start_main_~r~0#1| .cse18)) (.cse8 (not .cse19)) (.cse7 (+ .cse17 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~B~0#1| .cse18)) (.cse10 (div |c_ULTIMATE.start_main_~d~0#1| 2)) (.cse1 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse0 (< |c_ULTIMATE.start_main_~d~0#1| 0))) (and (or (and .cse0 (not .cse1)) (let ((.cse11 (<= .cse10 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse3 (or .cse11 .cse12)) (.cse4 (not .cse11)) (.cse5 (+ .cse10 |c_ULTIMATE.start_main_~A~0#1|))) (and (or .cse2 (and .cse3 (or .cse4 (= .cse5 .cse6)))) (or (and .cse3 (or .cse4 (= .cse5 .cse7))) .cse8 .cse9))))) (or (let ((.cse16 (<= (+ .cse10 1) |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse13 (or .cse16 .cse12)) (.cse14 (not .cse16)) (.cse15 (+ .cse10 |c_ULTIMATE.start_main_~A~0#1| 1))) (and (or .cse2 (and .cse13 (or .cse14 (= .cse15 .cse6)))) (or .cse8 (and .cse13 (or .cse14 (= .cse15 .cse7))) .cse9)))) .cse1 (not .cse0))))) (not (= (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~B~0#1|) |c_ULTIMATE.start_main_~d~0#1|))) (= (* 2 (* (div (- |c_ULTIMATE.start_main_~p~0#1|) (- 2)) |c_ULTIMATE.start_main_~B~0#1|)) |c_ULTIMATE.start_main_~d~0#1|) (let ((.cse20 (<= |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~A~0#1|))) (or (and (= (+ |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~A~0#1|) .cse20 (= |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (and (= 0 |c_ULTIMATE.start_main_~q~0#1|) (not .cse20)))) .cse12))) is different from false [2022-11-19 06:54:31,160 WARN L233 SmtUtils]: Spent 37.93s on a formula simplification. DAG size of input: 122 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:55:28,803 WARN L233 SmtUtils]: Spent 41.44s on a formula simplification. DAG size of input: 122 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:55:32,328 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 06:55:34,333 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 06:55:34,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:34,356 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2022-11-19 06:55:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 06:55:34,358 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 18 states have internal predecessors, (35), 17 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 14 states have call predecessors, (24), 15 states have call successors, (24) Word has length 81 [2022-11-19 06:55:34,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:34,360 INFO L225 Difference]: With dead ends: 120 [2022-11-19 06:55:34,360 INFO L226 Difference]: Without dead ends: 118 [2022-11-19 06:55:34,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 416.7s TimeCoverageRelationStatistics Valid=352, Invalid=1712, Unknown=26, NotChecked=460, Total=2550 [2022-11-19 06:55:34,363 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 117 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 65.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:34,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 98 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 320 Invalid, 16 Unknown, 254 Unchecked, 65.1s Time] [2022-11-19 06:55:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-19 06:55:34,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2022-11-19 06:55:34,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 29 states have call successors, (29), 15 states have call predecessors, (29), 15 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-19 06:55:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2022-11-19 06:55:34,433 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 81 [2022-11-19 06:55:34,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:34,434 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2022-11-19 06:55:34,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 18 states have internal predecessors, (35), 17 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 14 states have call predecessors, (24), 15 states have call successors, (24) [2022-11-19 06:55:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2022-11-19 06:55:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-19 06:55:34,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:34,436 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:34,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:34,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:55:34,643 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:34,644 INFO L85 PathProgramCache]: Analyzing trace with hash -48391824, now seen corresponding path program 2 times [2022-11-19 06:55:34,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:34,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294436483] [2022-11-19 06:55:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:34,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:34,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:55:34,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632973873] [2022-11-19 06:55:34,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:55:34,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:34,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:34,655 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:34,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:55:34,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 06:55:34,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:55:34,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 06:55:34,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 122 proven. 39 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-11-19 06:55:35,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-11-19 06:55:35,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:35,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294436483] [2022-11-19 06:55:35,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:55:35,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632973873] [2022-11-19 06:55:35,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632973873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:35,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1825418102] [2022-11-19 06:55:35,291 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-19 06:55:35,291 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:55:35,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:55:35,292 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:55:35,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:55:38,353 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-19 06:55:38,381 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:55:40,249 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5445#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:55:40,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:55:40,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:55:40,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2022-11-19 06:55:40,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676972126] [2022-11-19 06:55:40,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:40,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 06:55:40,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:40,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 06:55:40,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-11-19 06:55:40,253 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-19 06:55:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:41,095 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2022-11-19 06:55:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:55:41,095 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 92 [2022-11-19 06:55:41,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:41,096 INFO L225 Difference]: With dead ends: 118 [2022-11-19 06:55:41,096 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 06:55:41,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 245 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 06:55:41,102 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:41,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 63 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:55:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 06:55:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 06:55:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 06:55:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 06:55:41,104 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2022-11-19 06:55:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:41,105 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 06:55:41,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-19 06:55:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 06:55:41,105 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 06:55:41,109 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 06:55:41,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:41,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 06:55:41,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-19 06:55:51,831 WARN L233 SmtUtils]: Spent 8.61s on a formula simplification. DAG size of input: 241 DAG size of output: 110 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-19 06:55:58,572 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 206 DAG size of output: 96 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-19 06:56:05,109 WARN L233 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 241 DAG size of output: 110 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-19 06:56:11,712 WARN L233 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 241 DAG size of output: 110 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-19 06:56:30,215 WARN L233 SmtUtils]: Spent 15.44s on a formula simplification. DAG size of input: 215 DAG size of output: 8 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-19 06:56:36,340 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 241 DAG size of output: 110 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-19 06:56:36,432 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-19 06:56:36,433 INFO L895 garLoopResultBuilder]: At program point L33-2(lines 33 41) the Hoare annotation is: (let ((.cse2 (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|))) (.cse1 (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (.cse0 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 (<= 1 |ULTIMATE.start_main_~r~0#1|) (= |ULTIMATE.start_main_~d~0#1| (* 2 (* .cse1 |ULTIMATE.start_main_~B~0#1|))) .cse2 .cse3 .cse4 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse5 (* |ULTIMATE.start_main_~B~0#1| (div (- .cse1) (- 2))))) (and (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (* .cse5 4) |ULTIMATE.start_main_~d~0#1|) .cse2 .cse3 .cse4)) (let ((.cse7 (select |#memory_int| 1)) (.cse6 (select |#memory_int| 2))) (and (<= 0 (+ |ULTIMATE.start_main_~A~0#1| 2147483648)) (= (select .cse6 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse6 2)) (= (select .cse6 6) 99) (= 97 (select .cse6 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse6 4) 50) (= 100 (select .cse6 3)) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 1) 1) .cse0 (<= |ULTIMATE.start_main_~A~0#1| 2147483647) (= (select |#valid| 0) 0) (= (select .cse6 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse7 0) 48) .cse3 .cse4 (= (select .cse7 1) 0) (= (select .cse6 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) [2022-11-19 06:56:36,433 INFO L902 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: true [2022-11-19 06:56:36,433 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|)) (.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse5 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse4 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (and (<= 0 (+ |ULTIMATE.start_main_~A~0#1| 2147483648)) (= (select .cse0 7) 0) (= (select |#length| 3) 12) (= |ULTIMATE.start_main_~p~0#1| 1) (= 114 (select .cse0 2)) (= (select .cse0 6) 99) (= 97 (select .cse0 1)) (= 2 (select |#length| 1)) .cse1 (= (select |#valid| 3) 1) (= (select .cse0 4) 50) (= 100 (select .cse0 3)) .cse2 (= (select |#valid| 1) 1) .cse3 (= (select |#valid| 0) 0) (= (select .cse0 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse4 0) 48) .cse5 (= (select .cse4 1) 0) (= (select .cse0 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) .cse5) (and (= (+ |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) .cse1 (= |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~q~0#1| 1) (<= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~A~0#1|) .cse5) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse2 .cse3 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse5 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-11-19 06:56:36,433 INFO L895 garLoopResultBuilder]: At program point L44-1(line 44) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|)) (.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse5 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse4 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (and (<= 0 (+ |ULTIMATE.start_main_~A~0#1| 2147483648)) (= (select .cse0 7) 0) (= (select |#length| 3) 12) (= |ULTIMATE.start_main_~p~0#1| 1) (= 114 (select .cse0 2)) (= (select .cse0 6) 99) (= 97 (select .cse0 1)) (= 2 (select |#length| 1)) .cse1 (= (select |#valid| 3) 1) (= (select .cse0 4) 50) (= 100 (select .cse0 3)) .cse2 (= (select |#valid| 1) 1) .cse3 (= (select |#valid| 0) 0) (= (select .cse0 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse4 0) 48) .cse5 (= (select .cse4 1) 0) (= (select .cse0 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) .cse5) (and (= (+ |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) .cse1 (= |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~q~0#1| 1) (<= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~A~0#1|) .cse5) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse2 .cse3 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse5 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-11-19 06:56:36,434 INFO L899 garLoopResultBuilder]: For program point L36(lines 33 41) no Hoare annotation was computed. [2022-11-19 06:56:36,434 INFO L895 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (let ((.cse2 (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|))) (.cse1 (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (.cse0 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 (<= 1 |ULTIMATE.start_main_~r~0#1|) (= |ULTIMATE.start_main_~d~0#1| (* 2 (* .cse1 |ULTIMATE.start_main_~B~0#1|))) .cse2 .cse3 .cse4 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse5 (* |ULTIMATE.start_main_~B~0#1| (div (- .cse1) (- 2))))) (and (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (* .cse5 4) |ULTIMATE.start_main_~d~0#1|) .cse2 .cse3 .cse4)) (let ((.cse7 (select |#memory_int| 1)) (.cse6 (select |#memory_int| 2))) (and (<= 0 (+ |ULTIMATE.start_main_~A~0#1| 2147483648)) (= (select .cse6 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse6 2)) (= (select .cse6 6) 99) (= 97 (select .cse6 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse6 4) 50) (= 100 (select .cse6 3)) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 1) 1) .cse0 (<= |ULTIMATE.start_main_~A~0#1| 2147483647) (= (select |#valid| 0) 0) (= (select .cse6 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse7 0) 48) .cse3 .cse4 (= (select .cse7 1) 0) (= (select .cse6 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) [2022-11-19 06:56:36,434 INFO L895 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse2 (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|))) (.cse1 (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (.cse0 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 (<= 1 |ULTIMATE.start_main_~r~0#1|) (= |ULTIMATE.start_main_~d~0#1| (* 2 (* .cse1 |ULTIMATE.start_main_~B~0#1|))) .cse2 .cse3 .cse4 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse5 (* |ULTIMATE.start_main_~B~0#1| (div (- .cse1) (- 2))))) (and (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (* .cse5 4) |ULTIMATE.start_main_~d~0#1|) .cse2 .cse3 .cse4)) (let ((.cse7 (select |#memory_int| 1)) (.cse6 (select |#memory_int| 2))) (and (<= 0 (+ |ULTIMATE.start_main_~A~0#1| 2147483648)) (= (select .cse6 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse6 2)) (= (select .cse6 6) 99) (= 97 (select .cse6 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse6 4) 50) (= 100 (select .cse6 3)) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 1) 1) .cse0 (<= |ULTIMATE.start_main_~A~0#1| 2147483647) (= (select |#valid| 0) 0) (= (select .cse6 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse7 0) 48) .cse3 .cse4 (= (select .cse7 1) 0) (= (select .cse6 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) [2022-11-19 06:56:36,435 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-19 06:56:36,435 INFO L895 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= |ULTIMATE.start_main_~B~0#1| 1)) [2022-11-19 06:56:36,435 INFO L895 garLoopResultBuilder]: At program point L51-2(lines 22 60) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|)) (.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse5 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (let ((.cse4 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (and (<= 0 (+ |ULTIMATE.start_main_~A~0#1| 2147483648)) (= (select .cse0 7) 0) (= (select |#length| 3) 12) (= |ULTIMATE.start_main_~p~0#1| 1) (= 114 (select .cse0 2)) (= (select .cse0 6) 99) (= 97 (select .cse0 1)) (= 2 (select |#length| 1)) .cse1 (= (select |#valid| 3) 1) (= (select .cse0 4) 50) (= 100 (select .cse0 3)) .cse2 (= (select |#valid| 1) 1) .cse3 (= (select |#valid| 0) 0) (= (select .cse0 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse4 0) 48) .cse5 (= (select .cse4 1) 0) (= (select .cse0 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (and (<= 1 |ULTIMATE.start_main_~p~0#1|) (= |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~p~0#1|) .cse5) (and (= (+ |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) .cse1 (= |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~q~0#1| 1) (<= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~A~0#1|) .cse5) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse2 .cse3 (<= 1 |ULTIMATE.start_main_~r~0#1|) .cse5 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2022-11-19 06:56:36,435 INFO L899 garLoopResultBuilder]: For program point L45(lines 43 55) no Hoare annotation was computed. [2022-11-19 06:56:36,436 INFO L895 garLoopResultBuilder]: At program point L43-1(lines 43 55) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|)) (.cse3 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~A~0#1| (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|)) (<= 1 |ULTIMATE.start_main_~p~0#1|) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~A~0#1|) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|)) (let ((.cse2 (select |#memory_int| 1)) (.cse0 (select |#memory_int| 2))) (and (<= 0 (+ |ULTIMATE.start_main_~A~0#1| 2147483648)) (= (select .cse0 7) 0) (= (select |#length| 3) 12) (= |ULTIMATE.start_main_~p~0#1| 1) (= 114 (select .cse0 2)) (= (select .cse0 6) 99) (= 97 (select .cse0 1)) (= 2 (select |#length| 1)) .cse1 (= (select |#valid| 3) 1) (= (select .cse0 4) 50) (= 100 (select .cse0 3)) (= |ULTIMATE.start_main_~q~0#1| 0) (= (select |#valid| 1) 1) (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) (= (select |#valid| 0) 0) (= (select .cse0 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse2 0) 48) .cse3 (= (select .cse2 1) 0) (= (select .cse0 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (and (= (+ |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|) .cse1 (= |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~q~0#1| 1) (<= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~A~0#1|) .cse3))) [2022-11-19 06:56:36,436 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse2 (= (+ (* |ULTIMATE.start_main_~B~0#1| (div |ULTIMATE.start_main_~p~0#1| 2)) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) (+ (div |ULTIMATE.start_main_~d~0#1| 2) |ULTIMATE.start_main_~A~0#1|))) (.cse1 (div (- |ULTIMATE.start_main_~p~0#1|) (- 2))) (.cse0 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 (<= 1 |ULTIMATE.start_main_~r~0#1|) (= |ULTIMATE.start_main_~d~0#1| (* 2 (* .cse1 |ULTIMATE.start_main_~B~0#1|))) .cse2 .cse3 .cse4 (= 2 |ULTIMATE.start_main_~d~0#1|)) (let ((.cse5 (* |ULTIMATE.start_main_~B~0#1| (div (- .cse1) (- 2))))) (and (<= (* 2 .cse5) |ULTIMATE.start_main_~r~0#1|) (<= (* 2 |ULTIMATE.start_main_~B~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (* .cse5 4) |ULTIMATE.start_main_~d~0#1|) .cse2 .cse3 .cse4)) (let ((.cse7 (select |#memory_int| 1)) (.cse6 (select |#memory_int| 2))) (and (<= 0 (+ |ULTIMATE.start_main_~A~0#1| 2147483648)) (= (select .cse6 7) 0) (= (select |#length| 3) 12) (= 114 (select .cse6 2)) (= (select .cse6 6) 99) (= 97 (select .cse6 1)) (= 2 (select |#length| 1)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 3) 1) (= (select .cse6 4) 50) (= 100 (select .cse6 3)) (= (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~d~0#1|) (= (select |#valid| 1) 1) .cse0 (<= |ULTIMATE.start_main_~A~0#1| 2147483647) (= (select |#valid| 0) 0) (= (select .cse6 5) 46) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 8 (select |#length| 2)) (= (select .cse7 0) 48) .cse3 .cse4 (= (select .cse7 1) 0) (= (select .cse6 0) 104) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))) [2022-11-19 06:56:36,436 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-11-19 06:56:36,436 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-11-19 06:56:36,436 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-11-19 06:56:36,437 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-11-19 06:56:36,437 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-11-19 06:56:36,437 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-11-19 06:56:36,440 INFO L444 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 06:56:36,442 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 06:56:36,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:56:36 BoogieIcfgContainer [2022-11-19 06:56:36,468 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 06:56:36,468 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 06:56:36,468 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 06:56:36,469 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 06:56:36,469 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:43:18" (3/4) ... [2022-11-19 06:56:36,472 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-19 06:56:36,478 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-19 06:56:36,482 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2022-11-19 06:56:36,482 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2022-11-19 06:56:36,482 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-19 06:56:36,484 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 06:56:36,485 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 06:56:36,518 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 06:56:36,519 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 06:56:36,519 INFO L158 Benchmark]: Toolchain (without parser) took 799145.51ms. Allocated memory was 130.0MB in the beginning and 536.9MB in the end (delta: 406.8MB). Free memory was 91.5MB in the beginning and 422.9MB in the end (delta: -331.4MB). Peak memory consumption was 75.3MB. Max. memory is 16.1GB. [2022-11-19 06:56:36,519 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 130.0MB. Free memory is still 108.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:56:36,520 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.91ms. Allocated memory is still 130.0MB. Free memory was 91.3MB in the beginning and 104.7MB in the end (delta: -13.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 06:56:36,520 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.94ms. Allocated memory is still 130.0MB. Free memory was 104.7MB in the beginning and 103.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 06:56:36,520 INFO L158 Benchmark]: Boogie Preprocessor took 22.79ms. Allocated memory is still 130.0MB. Free memory was 103.4MB in the beginning and 102.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 06:56:36,521 INFO L158 Benchmark]: RCFGBuilder took 326.71ms. Allocated memory is still 130.0MB. Free memory was 102.1MB in the beginning and 89.9MB in the end (delta: 12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 06:56:36,521 INFO L158 Benchmark]: TraceAbstraction took 798426.72ms. Allocated memory was 130.0MB in the beginning and 536.9MB in the end (delta: 406.8MB). Free memory was 89.1MB in the beginning and 426.1MB in the end (delta: -337.0MB). Peak memory consumption was 310.8MB. Max. memory is 16.1GB. [2022-11-19 06:56:36,521 INFO L158 Benchmark]: Witness Printer took 50.41ms. Allocated memory is still 536.9MB. Free memory was 426.1MB in the beginning and 422.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 06:56:36,523 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 130.0MB. Free memory is still 108.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 276.91ms. Allocated memory is still 130.0MB. Free memory was 91.3MB in the beginning and 104.7MB in the end (delta: -13.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.94ms. Allocated memory is still 130.0MB. Free memory was 104.7MB in the beginning and 103.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.79ms. Allocated memory is still 130.0MB. Free memory was 103.4MB in the beginning and 102.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 326.71ms. Allocated memory is still 130.0MB. Free memory was 102.1MB in the beginning and 89.9MB in the end (delta: 12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 798426.72ms. Allocated memory was 130.0MB in the beginning and 536.9MB in the end (delta: 406.8MB). Free memory was 89.1MB in the beginning and 426.1MB in the end (delta: -337.0MB). Peak memory consumption was 310.8MB. Max. memory is 16.1GB. * Witness Printer took 50.41ms. Allocated memory is still 536.9MB. Free memory was 426.1MB in the beginning and 422.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 798.3s, OverallIterations: 11, TraceHistogramMax: 16, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 378.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 55.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 mSolverCounterUnknown, 350 SdHoareTripleChecker+Valid, 73.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 301 mSDsluCounter, 731 SdHoareTripleChecker+Invalid, 73.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 254 IncrementalHoareTripleChecker+Unchecked, 485 mSDsCounter, 505 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2235 IncrementalHoareTripleChecker+Invalid, 3012 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 505 mSolverCounterUnsat, 246 mSDtfsCounter, 2235 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1464 GetRequests, 1215 SyntacticMatches, 19 SemanticMatches, 230 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 430.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=10, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 35 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 66 PreInvPairs, 122 NumberOfFragments, 1777 HoareAnnotationTreeSize, 66 FomulaSimplifications, 1851 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 11 FomulaSimplificationsInter, 17148 FormulaSimplificationTreeSizeReductionInter, 54.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 322.8s InterpolantComputationTime, 541 NumberOfCodeBlocks, 464 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 973 ConstructedInterpolants, 6 QuantifiedInterpolants, 13326 SizeOfPredicates, 38 NumberOfNonLiveVariables, 1267 ConjunctsInSsa, 242 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 3150/3559 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 0.0s, TOOLS_POST_CALL_APPLICATIONS: 7, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 20, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 29, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 8, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 68, DAG_COMPRESSION_RETAINED_NODES: 33, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((0 <= A + 2147483648 && unknown-#memory_int-unknown[2][7] == 0) && unknown-#length-unknown[3] == 12) && p == 1) && 114 == unknown-#memory_int-unknown[2][2]) && unknown-#memory_int-unknown[2][6] == 99) && 97 == unknown-#memory_int-unknown[2][1]) && 2 == unknown-#length-unknown[1]) && B == d) && \valid[3] == 1) && unknown-#memory_int-unknown[2][4] == 50) && 100 == unknown-#memory_int-unknown[2][3]) && q == 0) && \valid[1] == 1) && A == r) && \valid[0] == 0) && unknown-#memory_int-unknown[2][5] == 46) && \valid[2] == 1) && #NULL == 0) && 8 == unknown-#length-unknown[2]) && unknown-#memory_int-unknown[1][0] == 48) && B == 1) && unknown-#memory_int-unknown[1][1] == 0) && unknown-#memory_int-unknown[2][0] == 104) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) || ((((1 <= p && A == q + r) && 2 * B <= A) && d == p) && B == 1)) || (((((B + r == A && B == d) && p == q) && q == 1) && B <= A) && B == 1)) || (((((2 == p && q == 0) && A == r) && 1 <= r) && B == 1) && 2 == d) - InvariantResult [Line: 58]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((((((A == r && 1 <= r) && d == 2 * (-p / -2 * B)) && B * (p / 2) + B * q + r == d / 2 + A) && d * q + r == A) && B == 1) && 2 == d) || (((((2 * (B * (-(-p / -2) / -2)) <= r && 2 * B <= d) && B * (-(-p / -2) / -2) * 4 == d) && B * (p / 2) + B * q + r == d / 2 + A) && d * q + r == A) && B == 1)) || ((((((((((((((((((((((((((0 <= A + 2147483648 && unknown-#memory_int-unknown[2][7] == 0) && unknown-#length-unknown[3] == 12) && 114 == unknown-#memory_int-unknown[2][2]) && unknown-#memory_int-unknown[2][6] == 99) && 97 == unknown-#memory_int-unknown[2][1]) && 2 == unknown-#length-unknown[1]) && B == d) && \valid[3] == 1) && unknown-#memory_int-unknown[2][4] == 50) && 100 == unknown-#memory_int-unknown[2][3]) && B * p == d) && \valid[1] == 1) && A == r) && A <= 2147483647) && \valid[0] == 0) && unknown-#memory_int-unknown[2][5] == 46) && \valid[2] == 1) && #NULL == 0) && 8 == unknown-#length-unknown[2]) && unknown-#memory_int-unknown[1][0] == 48) && d * q + r == A) && B == 1) && unknown-#memory_int-unknown[1][1] == 0) && unknown-#memory_int-unknown[2][0] == 104) && 0 < unknown-#StackHeapBarrier-unknown) && #NULL == 0) RESULT: Ultimate proved your program to be correct! [2022-11-19 06:56:36,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74aa9830-d517-49c3-ab7c-5ed8e8a675de/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE